CN103340646A - Method for calculating, displaying and storing radiation dosages of CT image formation - Google Patents
Method for calculating, displaying and storing radiation dosages of CT image formation Download PDFInfo
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Abstract
The invention discloses a method for calculating, displaying and storing radiation dosages of CT image formation. The method comprises the steps of, in CT scanning, calculating the average radiation dosage received by each tissue and each organ in the CT scanning, calculating the distribution of obtained radiation dosages, and uploading relevant information to a storage server; simultaneously displaying historical accumulated radiation dosages of relevant tissues and organs of the scanning according to all radiation dosage data, stored in the storage server, of a patient. The method uses tissues and organs as units, uses historical data, can monitor accumulated radiation dosages received by a specific organ of the patient, reminds the patient of targeted body examination after a threshold is surpassed, and reminds a doctor of proper adjustment of CT scanning parameters, so that the purpose of controlling accumulated radiation dosages of tissues and organs is further achieved.
Description
Technical field
The invention belongs to the CT technical field of imaging, relate to radiation dose calculating, demonstration and the storage means of CT imaging.
Background technology
The CT imaging technique is a kind of by measuring scanned object to the deamplification of incident X-rays under a plurality of angles, thereby is finally inversed by the method for internal structure of body.A medical diagnosis mainly comprises following a few part with the CT imaging device: X ray bulb, X-ray detector and the frame of placing X ray bulb and detector.In the CT scan process, frame is rotated round patient, and X ray emission and detector image data are carried out in the simultaneous computer programme-control.The CT imaging technique is based on tissue to the attenuation principle of incident X-rays, and X ray has certain radiation injury to human body, if human body has been accepted too much x-ray bombardment, even the danger of cause cancer is arranged.Along with the CT imaging technique is widely used in medical diagnosis, in the single CT scan process X ray to the radiation dose of human body and the integrated radiation dose that repeatedly human body is subjected to after the CT scan become the focus of concern gradually.
Through prior art retrieval back is found, the calculating of the total radiation dosage value that only is subjected at the human body after the single CT scan and the patent application of display packing at present discloses, and is 200710098952.1 patent application as application number.This patent application discloses a kind of CT image-forming radiation dosage display system, but the content of this patent application only limits to show total radiation dosage after the CT scan, can not add up the suffered X-radiation dosage of single histoorgan and reach repeatedly CT scan to the historical integrated radiation dose of certain histoorgan of patient.
Summary of the invention
The objective of the invention is to propose a kind of at the deficiencies in the prior art is radiation dose calculating, demonstration and the storage means of the CT imaging of dividing unit with the histoorgan.This method can more effectively be monitored patient and be used the CT imaging means to carry out the radiation injury of the X ray that is subjected in the physical examination, with the histoorgan be dividing unit CT image-forming radiation dosage calculating, demonstration and storage means effectively certain histoorgan of monitor patients owing to carry out the X-radiation dosage of the history accumulation that the CT imaging is subjected to.When the integrated radiation dose that is subjected to when certain organ of patient surpasses threshold value, physical examination targetedly can be pointed out by system, and prompting is suitably adjusted the CT scan parameter to the doctor that this patient carries out the CT scan operation, controls the X-radiation dosage that this time scanning patient is subjected to.
The present invention is achieved by the following technical solutions: the present invention at first obtains the calculating parameter for the radiation dose that calculates the CT imaging.The a series of continuous two-dimensional ct image that the CT imaging is obtained carries out three-dimensional image segmentation then, and identifies the histoorgan classification of divided area correspondence.The histoorgan that classification is good carries out correspondence with disclosed database data (as ICRP/ICRU), obtains element kind and density that each voxel comprises, and imports X-radiation Rapid Dose Calculation program with the CT imaging parameters.Use Monte Carlo technique to simulate this time CT imaging process, and calculate the radiation dose that each voxel is subjected in the CT scan imaging, and export with the form of radiation dose distributed fault figure.Calculate the average radiation dosage that each histoorgan is subjected in this CT scan, and be uploaded to storage server with CT imaging the structure tomograph that obtains and the radiation dose distributed fault figure that calculates gained.When the doctor uses the structure faultage image of CT imaging acquisition to carry out analysis and judgement, the radiation dose distributed fault figure of this fault plane correspondence shows simultaneously, and be stored in all radiation dose data on the storage server according to this patient, show the historical integrated radiation dose of the histoorgan that this time scanning is involved simultaneously.
The present invention includes following steps:
The first step is obtained the calculating parameter for the radiation dose that calculates the CT imaging.
The described calculating parameter that obtains for the radiation dose that calculates the CT imaging refers to obtain scanning system parameter and scanning process parameter.The scanning system parameter comprises X ray emission focus to the distance of frame center of rotation, and X ray emission focus is to the distance of detector, the physical dimension of detector, the spatial intensity distribution of the X ray that X ray filter disc kind and thickness and X ray bulb are launched.The scanning process parameter comprises each X ray emission and detector image data X ray bulb and the residing three-dimensional space position of detector constantly, the magnitude of voltage of X ray bulb, current value and corresponding X ray energy spectrum at this moment.
In second step, a series of continuous two-dimensional ct image that the CT imaging is obtained carries out three-dimensional image segmentation, and identifies the histoorgan classification of divided area correspondence.
The described a series of continuous two-dimensional ct image that the CT imaging is obtained carries out three-dimensional image segmentation, and identify the histoorgan classification of divided area correspondence, refer to from a series of layer datas of CT imaging reconstruction, carry out image segmentation according to information such as CT value and shapes, and identify the histoorgan classification of divided area correspondence.
In the 3rd step, the histoorgan that classification is good carries out correspondence with disclosed database data (as ICRP/ICRU), obtains element kind and density that each voxel comprises, and imports X-radiation Rapid Dose Calculation program with the CT imaging parameters.
The 4th step, the interaction process of X-ray and tissue in this time CT scan process is simulated in use based on the Monte Carlo X-ray radiation dose calculating method of GPU speed technology, and calculate the radiation dose that each individual pixel is subjected in the CT scan imaging, and export with the form of radiation dose distributed fault figure.
The interaction process of X-ray and tissue in this time CT scan process is simulated in described use based on the Monte Carlo X-ray radiation dose calculating method of GPU speed technology, and calculate the radiation dose that each individual pixel is subjected in the CT scan imaging, refer to use the Monte Carlo technique simulation to reappear X ray and the interactional physical process of bodily tissue in the CT scan imaging, obtain the radiation dose that each voxel is subjected in CT scan.
Described form with radiation dose distributed fault figure is exported, and refers to that the faultage image that goes out with the CT imaging reconstruction is similar, and the form that the radiation dose that each organ is subjected to distributes with faultage image shows.Intensity in the image that shows is indicated the radiation dose of the X ray that this position is subjected in the CT imaging process.
In the 5th step, calculate the average radiation dosage that each histoorgan is subjected in this CT scan, and be uploaded to storage server with CT imaging the structure tomograph that obtains and the radiation dose distributed fault figure that calculates gained.
The average radiation dosage that each histoorgan of described calculating is subjected in this CT scan, refer to that with second histoorgan that goes on foot after cutting apart be unit, calculate the summation of the radiation dose that each volume data is subjected in each histoorgan, then the volume data number that comprises divided by this histoorgan.
Described structure tomograph with CT imaging acquisition is uploaded to storage server with the radiation dose distributed fault figure that calculates gained, refer to a series of structure tomographs that the CT imaging is obtained and the 4th step calculate resulting a series of radiation dose distributed fault figure with data file reach storage server in form, and the average line radiation dose that single organ is subjected in the scanning this time that the 5th step was calculated reaches storage server with data form in form.
The 6th step, when the doctor uses the structure faultage image of CT imaging acquisition to carry out analysis and judgement, the radiation dose distributed fault figure of this fault plane correspondence shows simultaneously, and be stored in all radiation dose data on the storage server according to this patient, show the historical integrated radiation dose of the histoorgan that this time scanning is involved simultaneously.
Describedly be stored in all radiation dose data on the storage server according to this patient, the historical integrated radiation dose that shows the histoorgan that this time scanning is involved simultaneously, refer to show this patient average radiation dosage that histoorgan is subjected in this CT scan and the record of average radiation dosage that the histoorgan of this patient on storage server is subjected to adds up with tabular form, obtain historical integrated radiation dose, and show with the form of tabulation.
On the other hand, before according to above-mentioned explanation patient being carried out abdominal CT scan, under the necessary situation, the historical record of the X-ray CT radiation dose that is subjected to according to patient is suitably adjusted this time CT scan parameter, comprising:
1. the storage server that at first patient's personal information and this CT scan information is inputed to the CT radiation dose.
2. according to the record of this patient on the storage server, show the X-ray CT radiation record that this patient is subjected at doctor's operation interface, comprising: this patient's essential information; All CT scan number of times of this patient and the CT scan number of times in nearly a year; Integrated radiation dose and the integrated radiation dose in nearly a year of the histoorgan that this CT scan of this patient may relate to.Show in the form at operation interface and list if carry out organ that the doctor of CT operation judges that rule of thumb this time CT scan may relate to, can add voluntarily.
3.CT the radiation dose storage server is according to this patient's age, the historical integrated radiation dose of the histoorgan that this CT scan is involved and these histoorgans compare the warning value of X-ray integrated radiation dose.If surpass warning value, system points out the doctor that this CT scan is implemented radiation dose control at emphasis, and provides the CT scan parameter of recommendation with reference to the CT imaging system model of this CT imaging.The doctor can be according to system recommendations, and carry out the CT imaging in conjunction with the parameter that experience is suitably adjusted this CT scan.
4.CT behind the scanning imagery, calculate, show and store the radiation dose that this CT scan patient is subjected to.
Owing to adopted technique scheme, beneficial effect of the present invention comprises:
1. all carrying out with the histoorgan after each CT scan is the X-radiation Rapid Dose Calculation of unit, and is recorded in this patient's the electronic databank.Be conducive to like this integrated radiation dose of certain histoorgan of patient is checked.If the suffered integrated radiation dose of certain organ of a patient surpasses certain threshold value, the adverse consequences that can point out him to note the excessive initiation of X ray build-up radiation, and point out this patient regularly to carry out physical examination targetedly.
2. before each doctor carries out the CT scan operation, all can obtain the X-radiation dosage of this patient's organ accumulation.If the integrated radiation dose of a certain histoorgan is bigger than normal, system can point out.The doctor can suitably adjust in the CT scan parameter, reaches the effect to this patient's integrated radiation dose control.
Description of drawings
Fig. 1 is the schematic flow sheet of radiation dose calculating, demonstration and the storage means of CT imaging of the present invention;
Fig. 2 be the CT faultage image of an embodiment of the present invention and it is cut apart, identifies after histoorgan synopsis diagram;
Fig. 3 is the demonstration sketch map of structure tomograph, radiation dose distributed fault figure and the organ accumulated dose of a kind of exemplary CT imaging acquisition in the embodiment of the invention;
Fig. 4 is the X-ray CT radiation recording system sketch map in the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further details.
Embodiment 1: patient's first is carried out abdominal CT scan, calculate, show, store the radiation dose of this time CT scan then.
See also Fig. 1, comprise according to the implementation process of the inventive method:
1. obtain patient's first and carry out the systematic parameter of CT scan (step 105 among Fig. 1) and scanning process parameter (step 106 among Fig. 1).
2. according to information such as the CT value information of CT image (step 101 among Fig. 1) of input and planforms the CT image is carried out three-dimensional image segmentation (step 102 among Fig. 1), and identify the histoorgan classification (step 103 among Fig. 1) of divided area correspondence.As shown in Figure 2,201 is that CT scan obtains faultage image among the figure, the 202nd, and the histoorgan presentation graphs after this faultage image cut apart, identifies.
3. the good histoorgan of will classifying carries out correspondence with disclosed database data (as ICRP/ICRU), obtain element kind and density (step 104 among Fig. 1) that each voxel comprises, and input to X-radiation Rapid Dose Calculation program with CT scan systematic parameter and scanning process parameter.
4. use the interaction process of simulating X-ray and tissue in this time CT scan process based on the Monte Carlo X-ray radiation dose calculating method of GPU speed technology, calculate the radiation dose (step 107 among Fig. 1) that each individual pixel is subjected in the CT scan imaging.According to a series of CT structure faultage images of input, export the radiation dose distributed fault figure (step 108 among Fig. 1) of each structure faultage image correspondence.
5. calculate the average radiation dosage (step 109 among Fig. 1) that each histoorgan is subjected in this CT scan, and be uploaded to storage server (step 110 among Fig. 1) with CT imaging the structure tomograph that obtains and the radiation dose distributed fault figure that calculates gained.
6. when the doctor carries out analysis and judgement according to the CT structure faultage image of patient's first, the radiation dose distributed fault figure of this fault plane correspondence shows simultaneously, and be stored in all radiation dose data on the storage server according to this patient, the historical integrated radiation dose that shows the histoorgan that this time scanning is involved simultaneously, and the form demonstration (step 111 among Fig. 1) to tabulate.Display interface as shown in Figure 3,301 is that CT scan obtains structure faultage image, the 302nd, the dose distribution map of this fault plane correspondence, the 303rd, the current radiation dose of the histoorgan that this time scanning relates to and historical integrated radiation dose among the figure.
Embodiment 2: before patient's second was carried out abdominal CT scan, the historical record of the X-ray CT radiation dose that is subjected to according to patient's second was suitably adjusted this time CT scan parameter.
See also Fig. 1, comprise according to the implementation process of the inventive method:
1. the doctor that patient's second is implemented the CT scan imaging storage server (step 110 among Fig. 1) that at first personal information and this CT scan information (step 100 among Fig. 1) of patient's second inputed to the CT radiation dose.
2. according to the record of the patient's second on the storage server, show the X-ray CT radiation record that this patient is subjected at doctor's operation interface, as shown in Figure 4.Comprising: this patient's essential information (among Fig. 4 401); All CT scan number of times of this patient and the CT scan number of times in nearly a year (among Fig. 4 402); This patient is the integrated radiation dose of CT scan histoorgan that may relate to and the integrated radiation dose in nearly a year (among Fig. 4 403) this time.Judge that rule of thumb the organ that this time CT scan may relate to do not list in 403 forms if carry out the doctor of CT operation in Fig. 4, can add voluntarily by 404 options among Fig. 4.
3.CT the radiation dose storage server is according to the age of patient's second, the historical integrated radiation dose of the histoorgan that this CT scan is involved and these histoorgans compare the warning value of X-ray integrated radiation dose.If surpass warning value, system points out the doctor that this CT scan is implemented radiation dose control (405 emphasis show that the integrated radiation dose that this patient's pulmonary is subjected to is excessive among Fig. 4) at emphasis, and provides the CT scan parameter (among Fig. 4 406) of recommendation with reference to the CT imaging system model of this CT imaging.The doctor can be according to system recommendations, and carry out the CT imaging in conjunction with the parameter that experience is suitably adjusted this CT scan.
4.CT it is similar to embodiment 1 behind the scanning imagery, to calculate, show and store the radiation dose process that this CT scan patient second is subjected to, this does not give unnecessary details.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. radiation dose calculating, demonstration and the storage means of a CT imaging, it is characterized in that: in CT scan, calculate the average radiation dosage that each histoorgan is subjected in this CT scan, calculate radiation dose and distribute, afterwards relevant information is uploaded to storage server together; Be stored in all radiation dose data on the storage server according to this patient, show the historical integrated radiation dose of the histoorgan that this time scanning is involved simultaneously.
2. method according to claim 1 is characterized in that: may further comprise the steps:
The first step is obtained the calculating parameter for the radiation dose that calculates the CT imaging;
In second step, a series of continuous two-dimensional ct image that the CT imaging is obtained carries out three-dimensional image segmentation, and identifies the histoorgan classification of divided area correspondence;
In the 3rd step, the histoorgan that classification is good carries out correspondence with disclosed database data, obtains element kind and density that each voxel comprises, and imports X-radiation Rapid Dose Calculation program with the CT imaging parameters;
In the 4th step, simulate this time CT imaging process, and calculate the radiation dose that each individual pixel is subjected in the CT scan imaging;
In the 5th step, calculate the average radiation dosage that each histoorgan is subjected in this CT scan, and be uploaded to storage server with the radiation dose distributed intelligence of calculating gained;
The 6th step was stored in all radiation dose data on the storage server according to this patient, showed the historical integrated radiation dose of the histoorgan that this time scanning is involved simultaneously.
3. method according to claim 2 is characterized in that: the disclosed database data described in the 3rd step is ICRP/ICRU; Perhaps,
Use Monte Carlo technique to simulate this time CT imaging process in the 4th step, and calculate the radiation dose that each individual pixel is subjected in the CT scan imaging; Preferably, and with the form of radiation dose distributed fault figure export; Perhaps,
Average radiation dosage and radiation dose distributed intelligence described in the 5th step are that the structure tomograph that obtains with the CT imaging and the form of calculating the radiation dose distributed fault figure of gained are uploaded to storage server together; Perhaps,
When the structure faultage image that uses the CT imaging to obtain in the 6th step carries out analysis and judgement, the radiation dose distributed fault figure of this fault plane correspondence shows simultaneously, and be stored in all radiation dose data on the storage server according to this patient, show the historical integrated radiation dose of the histoorgan that this time scanning is involved simultaneously.
4. method according to claim 2 is characterized in that: described " obtaining the calculating parameter for the radiation dose that calculates the CT imaging " refers to obtain scanning system parameter and scanning process parameter; Described scanning system parameter comprises that X ray emission focus launches focus to the distance of detector, physical dimension, X ray filter disc kind and the thickness of detector and the spatial intensity distribution of the X ray that the X ray bulb is launched to distance, the X ray of frame center of rotation; Described scanning process parameter comprise the emission of each X ray and detector image data constantly X ray bulb and the residing three-dimensional space position of detector, this moment the X ray bulb the X ray energy spectrum of magnitude of voltage, current value and correspondence.
5. method according to claim 2, it is characterized in that: described " a series of continuous two-dimensional ct image that the CT imaging is obtained carries out three-dimensional image segmentation; and identify the histoorgan classification of divided area correspondence " refer to from a series of layer datas of CT imaging reconstruction, carry out image segmentation according to information such as CT value and shapes, and identify the histoorgan classification of divided area correspondence.
6. method according to claim 3, it is characterized in that: described " use Monte Carlo technique to simulate this time CT imaging process; and calculate the radiation dose that each individual pixel is subjected in the CT scan imaging " refer to use the Monte Carlo technique simulation to reappear X ray and the interactional physical process of bodily tissue in the CT scan imaging, obtain the radiation dose that each voxel is subjected in CT scan; Perhaps,
Described " form with radiation dose distributed fault figure is exported " refers to that the faultage image that goes out with the CT imaging reconstruction is similar, the form that the radiation dose that each organ is subjected to distributes with faultage image shows, the intensity in the image of demonstration is indicated the radiation dose of the X ray that this position is subjected in the CT imaging process.
7. method according to claim 2, it is characterized in that: described " calculating the average radiation dosage that each histoorgan is subjected in this CT scan " refers to that with second histoorgan that goes on foot after cutting apart be unit, calculate the summation of the radiation dose that each volume data is subjected in each histoorgan, then the volume data number that comprises divided by this histoorgan.
8. method according to claim 3, it is characterized in that: described " average radiation dosage and radiation dose distributed intelligence are that the structure tomograph that obtains with the CT imaging and the form of calculating the radiation dose distributed fault figure of gained are uploaded to storage server together " refer to a series of structure tomographs that the CT imaging is obtained and the 4th step calculate resulting a series of radiation dose distributed fault figure with data file reach storage server in form, and the average line radiation dose that single organ is subjected in the scanning this time that the 5th step was calculated reaches storage server with data form in form; Perhaps,
Described " being stored in all radiation dose data on the storage server according to this patient; show the historical integrated radiation dose of the histoorgan that this time scanning is involved simultaneously " refers to show this patient average radiation dosage that histoorgan is subjected in this CT scan and the record of average radiation dosage that the histoorgan of this patient on storage server is subjected to adds up with tabular form, obtain historical integrated radiation dose, and show with the form of tabulation.
9. method according to claim 1 is characterized in that: before patient was carried out abdominal CT scan, the historical record of the X-ray CT radiation dose that is subjected to according to patient was adjusted this time CT scan parameter.
10. method according to claim 9 is characterized in that: described " historical record of the X-ray CT radiation dose that is subjected to according to patient is adjusted this time CT scan parameter " comprising:
1. the storage server that at first patient's personal information and this CT scan information is inputed to the CT radiation dose;
2. according to the record of this patient on the storage server, show the X-ray CT radiation record that this patient is subjected at doctor's operation interface, comprising: this patient's essential information; All CT scan number of times of this patient and the CT scan number of times in nearly a year; Integrated radiation dose and the integrated radiation dose in nearly a year of the histoorgan that this CT scan of this patient may relate to; Show in the form at operation interface and list if carry out organ that the doctor of CT operation judges that rule of thumb this time CT scan may relate to, can add voluntarily;
3.CT the radiation dose storage server is according to this patient's age, the historical integrated radiation dose of the histoorgan that this CT scan is involved and these histoorgans compare the warning value of X-ray integrated radiation dose; If surpass warning value, system points out the doctor that this CT scan is implemented radiation dose control at emphasis, and provides the CT scan parameter of recommendation with reference to the CT imaging system model of this CT imaging; The doctor can be according to system recommendations, and carry out the CT imaging in conjunction with the parameter that experience is suitably adjusted this CT scan.
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