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- JP2010178989A5 JP2010178989A5 JP2009026447A JP2009026447A JP2010178989A5 JP 2010178989 A5 JP2010178989 A5 JP 2010178989A5 JP 2009026447 A JP2009026447 A JP 2009026447A JP 2009026447 A JP2009026447 A JP 2009026447A JP 2010178989 A5 JP2010178989 A5 JP 2010178989A5
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請求項３に記載の放射線治療装置は、被検体を載置する天板と、前記天板を３次元的に移動可能に支持する寝台と、前記寝台を支える支柱を中心に前記寝台を床と水平方向に回転させる第１寝台回転手段と、放射線の放射中心線を中心に前記寝台を水平方向に回転させる第２寝台回転手段と、前記被検体に向けて放射線を照射する放射線照射手段と、前記放射線照射手段から照射された放射線の照射野を規定する、前記放射線の照射方向と直交する方向に回転可能なコリメータとを有し、かつ前記天板の長手方向の軸に直交する方向から放射線が照射されるように前記放射線照射手段及び前記コリメータを備えており、さらに前記天板の長手方向の軸に直交する方向に回転可能に配置された架台と、前記被検体を透過した放射線を基に画像を生成する画像生成手段と、を有する放射線治療装置であって、放射線を遮蔽する効果を有する材質で構成された各々直交する３つの平板部材を有する放射線治療装置校正用ファントムを備え、前記放射線照射手段から該校正用ファントムに向けて放射線を照射し、前記画像生成手段により生成された前記校正用ファントムの前記床に対して略鉛直方向又は前記床に対する鉛直方向と前記天板の長手方向の軸とに略直交する方向の前記平板部材に基づく略十字の画像を基に、前記第１寝台回転手段、前記第２寝台回転手段、前記コリメータ、又は前記架台の各回転軸のうちの少なくとも一つのずれがあることを検出する画像処理手段、を備えたことを特徴とするものである。 The radiotherapy apparatus according to claim 3, a top plate for placing the object, and a bed for supporting movably the top plate 3 dimensionally, the bed around a post supporting the bed and the floor a first bed rotating means for rotating the horizontal direction, and a second bed rotating means for rotating the bed about a radial center line of the radiological horizontally, a radiation emitting device for emitting radiation toward the subject A collimator that defines an irradiation field of the radiation irradiated from the radiation irradiating means and that is rotatable in a direction orthogonal to the irradiation direction of the radiation, and from a direction orthogonal to the longitudinal axis of the top plate The radiation irradiating means and the collimator are provided so as to irradiate radiation, and further, a gantry arranged to be rotatable in a direction orthogonal to the longitudinal axis of the top plate, and radiation transmitted through the subject. Image based on A radiation therapy apparatus comprising: a radiation therapy apparatus calibration phantom having three orthogonal plate members each made of a material having an effect of shielding radiation; The calibration phantom is irradiated with radiation toward the calibration phantom, and the calibration phantom generated by the image generation means is substantially perpendicular to the floor or the vertical direction to the floor and the longitudinal axis of the top plate. Based on a substantially cross-shaped image based on the flat plate member in a direction substantially perpendicular to the first member, at least one of the rotation axes of the first bed rotation means, the second bed rotation means, the collimator, and the gantry The image processing means for detecting the presence of image data is provided.
請求項６に記載の放射線治療装置校正方法は、被検体を載置する天板と、前記天板を３次元的に移動可能に支持する寝台と、前記寝台を支える支柱を中心に前記寝台を床と水平方向に回転させる第１寝台回転手段と、放射線の放射中心線を中心に前記寝台を回転させる第２寝台回転手段と、前記被検体に向けて放射線を照射する放射線照射手段と、前記放射線照射手段から照射された放射線の照射野を規定する、前記放射線の照射方向と直交する方向に回転可能なコリメータとを有し、前記天板の長手方向の軸に直交する方向から放射線が照射されるように前記放射線照射手段及び前記コリメータを備えており、さらに前記天板の長手方向の軸に直交する方向に回転可能に配置された架台と、前記被検体を透過した放射線を基に画像を生成する画像生成手段と、を備えた放射線治療装置の回転軸の校正を行う放射線治療装置校正方法であって、放射線を遮蔽する効果を有する材質で構成された各々直交する３つの平板部材を有する放射線治療装置校正用ファントムを前記天板に配置するファントム配置段階と、前記天板に配置された前記放射線治療装置校正用ファントムへ向けて放射線を照射する放射線照射段階と、前記放射線治療装置校正用ファントムを透過した放射線を基に、該校正用ファントムの画像を生成する段階と、前記校正用ファントムの画像から前記床に対して略鉛直方向の前記平板部材部分に基づく略十字の第１の画像を取得する第１画像取得段階と、前記校正用ファントムの画像から前記床に対する鉛直方向と前記天板の長手方向の軸とに略直交する方向の前記平板部材に基づく略十字の第２の画像を取得する第２画像取得段階と、前記１の画像と前記第２の画像との各々を基に、前記第１回転手段、前記第２回転手段、前記コリメータ、又は前記架台の各回転軸のうちの少なくとも一つにずれがあることを検出するずれ検出段階と、を有することを特徴とするものである。 The radiotherapy apparatus calibration method according to claim 6, wherein the couch is arranged around a couch for placing a subject, a couch that supports the couch so as to be movable three-dimensionally, and a column that supports the couch. a first bed rotating means for rotating the floor and the horizontal direction, and a second bed rotating means for rotating the bed about a radial center line of the radiological, a radiation emitting device for emitting radiation toward the subject, A collimator that defines an irradiation field of the radiation emitted from the radiation irradiating means and is rotatable in a direction perpendicular to the radiation direction of the radiation, and radiation is emitted from a direction perpendicular to the longitudinal axis of the top plate. The irradiation means and the collimator are provided so as to be irradiated, and further, a gantry arranged to be rotatable in a direction perpendicular to the longitudinal axis of the top plate and radiation transmitted through the subject Generate image A radiotherapy apparatus calibration method for calibrating a rotation axis of a radiotherapy apparatus having an image generation means, and comprising three orthogonal plate members each made of a material having an effect of shielding radiation A phantom arranging step of arranging a device calibration phantom on the top plate, a radiation irradiation step of irradiating radiation toward the radiation therapy device calibration phantom arranged on the top plate, and the radiation therapy device calibration phantom A step of generating an image of the calibration phantom based on the transmitted radiation, and obtaining a first image of a substantially cross based on the flat plate member portion in a direction substantially perpendicular to the floor from the image of the calibration phantom A first image acquisition step, and a direction substantially perpendicular to the vertical direction of the floor and the longitudinal axis of the top plate from the image of the calibration phantom Based on the second image acquisition step of acquiring a second image of a substantially cross based on the plate member, and each of the first image and the second image, the first rotation means, the second rotation means, A deviation detecting step of detecting that there is a deviation in at least one of the collimator or each rotation axis of the gantry.
Claims (8)
該直方体部材における平行な各辺の中心点を結ぶ位置に配置された、放射線を遮蔽する効果を有する材質で構成された各々直交する３つの平板部材と、
で構成されたことを特徴とする放射線治療装置校正用ファントム。 A rectangular parallelepiped member having a rectangular parallelepiped shape made of a material through which radiation can pass;
Three orthogonal plate members each made of a material having an effect of shielding radiation, disposed at a position connecting the center points of parallel sides of the rectangular parallelepiped member;
A phantom for calibrating a radiation therapy apparatus, characterized by comprising:
前記天板を３次元的に移動可能に支持する寝台と、
前記寝台を支える支柱を中心に前記寝台を床と水平方向に回転させる第１寝台回転手段と、
放射線の放射中心線を中心に前記寝台を水平方向に回転させる第２寝台回転手段と、
前記被検体に向けて放射線を照射する放射線照射手段と、前記放射線照射手段から照射された放射線の照射野を規定する、前記放射線の照射方向と直交する方向に回転可能なコリメータとを有し、かつ前記天板の長手方向の軸に直交する方向から放射線が照射されるように前記放射線照射手段及び前記コリメータを備えており、さらに前記天板の長手方向の軸に直交する方向に回転可能に配置された架台と、
前記被検体を透過した放射線を基に画像を生成する画像生成手段と、を有する放射線治療装置であって、
放射線を遮蔽する効果を有する材質で構成された各々直交する３つの平板部材を有する放射線治療装置校正用ファントムを備え、
前記放射線照射手段から該校正用ファントムに向けて放射線を照射し、前記画像生成手段により生成された前記校正用ファントムの前記床に対して略鉛直方向又は前記床に対する鉛直方向と前記天板の長手方向の軸とに略直交する方向の前記平板部材に基づく略十字の画像を基に、前記第１寝台回転手段、前記第２寝台回転手段、前記コリメータ、又は前記架台の各回転軸のうちの少なくとも一つのずれがあることを検出する画像処理手段、
を備えたことを特徴とする放射線治療装置。 A top plate on which the subject is placed;
A bed for supporting the top plate in a three-dimensional manner;
A first bed rotating means for rotating the bed to the floor and a horizontal direction around the pillar to support the bed,
A second bed rotating means for rotating the bed in a horizontal direction about the radial center line of the ray release,
A radiation irradiating means for irradiating radiation toward the subject; and a collimator that defines an irradiation field of the radiation irradiated from the radiation irradiating means, and is rotatable in a direction orthogonal to the irradiation direction of the radiation, The radiation irradiating means and the collimator are provided so that radiation is emitted from a direction perpendicular to the longitudinal axis of the top plate, and further rotatable in a direction perpendicular to the longitudinal axis of the top plate. A placed gantry,
An image generation means for generating an image based on radiation transmitted through the subject,
A radiation therapy device calibration phantom having three orthogonal plate members each made of a material having an effect of shielding radiation;
The radiation irradiating means emits radiation toward the calibration phantom, and the calibration phantom generated by the image generating means is substantially perpendicular to the floor or perpendicular to the floor and the length of the top plate. Based on a substantially cross-shaped image based on the flat plate member in a direction substantially orthogonal to the direction axis, the first bed rotation means, the second bed rotation means, the collimator, or the rotation shafts of the gantry Image processing means for detecting that there is at least one shift;
A radiotherapy apparatus comprising:
コントラストの変化の閾値及び前記略十字の画像の傾きの閾値を記憶しており、
前記略十字の画像の幅方向のコントラストの変化が前記閾値以上の変化をしている、もしくは前記略十字の画像の各辺の傾きが前記傾きの閾値を超えている場合には、前記回転軸のずれを検出する
ことを特徴とする請求項３に記載の放射線治療装置。 The image processing means includes
Storing a contrast change threshold value and a threshold value of the inclination of the substantially cross-shaped image;
When the change in contrast in the width direction of the substantially cross-shaped image changes more than the threshold value, or when the inclination of each side of the substantially cross-shaped image exceeds the threshold value of the inclination, the rotation axis The radiotherapy apparatus according to claim 3, wherein a deviation is detected.
放射線を遮蔽する効果を有する材質で構成された各々直交する３つの平板部材を有する放射線治療装置校正用ファントムを前記天板に配置するファントム配置段階と、
前記天板に配置された前記放射線治療装置校正用ファントムへ向けて放射線を照射する放射線照射段階と、
前記放射線治療装置校正用ファントムを透過した放射線を基に、該校正用ファントムの画像を生成する段階と、
前記校正用ファントムの画像から前記床に対して略鉛直方向の前記平板部材部分に基づく略十字の第１の画像を取得する第１画像取得段階と、
前記校正用ファントムの画像から前記床に対する鉛直方向と前記天板の長手方向の軸とに略直交する方向の前記平板部材に基づく略十字の第２の画像を取得する第２画像取得段階と、
前記１の画像と前記第２の画像との各々を基に、前記第１回転手段、前記第２回転手段、前記コリメータ、又は前記架台の各回転軸のうちの少なくとも一つにずれがあることを検出するずれ検出段階と、
を有することを特徴とする放射線治療装置校正方法。 A couch for placing a subject; a couch for supporting the couch so as to move three-dimensionally; and a first couch rotating means for rotating the couch horizontally with respect to a floor around a column supporting the couch. a second bed rotating means for rotating the bed about a radial center line of the radiological, a radiation emitting device for emitting radiation toward the subject, an irradiation field of the radiation emitted from the radiation emitting device A collimator that is rotatable in a direction perpendicular to the radiation direction of the radiation, and the radiation irradiating means and the collimator are arranged so that radiation is emitted from a direction perpendicular to the longitudinal axis of the top plate. Radiation comprising: a gantry arranged to be rotatable in a direction perpendicular to the longitudinal axis of the top plate; and image generation means for generating an image based on the radiation transmitted through the subject. Therapeutic device A radiotherapy apparatus calibration method for calibrating the rotation axis,
A phantom arrangement stage in which a radiation therapy apparatus calibration phantom having three plate members orthogonal to each other and made of a material having an effect of shielding radiation is arranged on the top board;
A radiation irradiation step of irradiating radiation toward the radiotherapy device calibration phantom disposed on the top plate;
Generating an image of the calibration phantom based on radiation transmitted through the radiation therapy apparatus calibration phantom;
A first image acquisition step of acquiring, from the image of the calibration phantom, a first image of a substantially cross based on the flat plate member portion in a direction substantially perpendicular to the floor;
A second image acquisition step of acquiring, from the image of the calibration phantom, a second image having a substantially cross shape based on the flat plate member in a direction substantially perpendicular to a vertical direction with respect to the floor and a longitudinal axis of the top plate;
Based on each of the first image and the second image, at least one of the first rotation means, the second rotation means, the collimator, or each rotation shaft of the gantry has a shift. A deviation detection stage for detecting
A radiation therapy apparatus calibration method comprising:
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| JP2013046709A (en) * | 2011-08-29 | 2013-03-07 | Hirosaki Univ | Displacement measurement method of isocenter in radiotherapy apparatus, adjustment method of displacement of the same, and phantom for displacement measurement |
| JP5793703B2 (en) * | 2011-09-30 | 2015-10-14 | パナソニックＩｐマネジメント株式会社 | Automatic head care device and automatic head care method |
| JP5763516B2 (en) * | 2011-12-14 | 2015-08-12 | アサヒビール株式会社 | Test can for X-ray liquid level inspection equipment |
| JP2016036515A (en) * | 2014-08-07 | 2016-03-22 | 株式会社東芝 | X-ray diagnostic apparatus |
| JP6578574B2 (en) * | 2015-06-03 | 2019-09-25 | 国立研究開発法人量子科学技術研究開発機構 | Radiation therapy device calibration phantom |
| CN105944242A (en) * | 2016-05-11 | 2016-09-21 | 谷晓华 | Consistency verification device of center of cone beam CT (CBCT) image and isocenter of linear accelerator and manufacturing method thereof |
| JP6896606B2 (en) | 2017-12-27 | 2021-06-30 | 東芝エネルギーシステムズ株式会社 | Flat panel detector position adjustment device, flat panel detector position adjustment method and radiation therapy device |
| KR102219337B1 (en) * | 2019-04-11 | 2021-02-23 | 사회복지법인 삼성생명공익재단 | System and method for quality assurance of radiation isocenter of radiation diagnosis and therapy device |
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| JPH0751128B2 (en) * | 1988-06-13 | 1995-06-05 | 三菱電機株式会社 | Radiation irradiation device |
| DE19907065A1 (en) * | 1999-02-19 | 2000-08-31 | Schwerionenforsch Gmbh | Method for checking an isocenter and a patient positioning device of an ion beam therapy system |
| DE102006021632A1 (en) * | 2006-05-09 | 2007-11-15 | Siemens Ag | Medical device, test specimen and method for checking the positioning accuracy of a patient table with respect to an isocenter of a medical device |
| JP4500947B2 (en) * | 2006-08-17 | 2010-07-14 | 学校法人 久留米大学 | A cassette for accuracy management of a radiotherapy device and a method of accuracy management of the radiotherapy device |
| WO2008072323A1 (en) * | 2006-12-13 | 2008-06-19 | Imagnosis Inc. | Medical imaging marker |
| JP2008148964A (en) * | 2006-12-19 | 2008-07-03 | Ge Medical Systems Global Technology Co Llc | Composite apparatus for radiotherapy and data acquisition system for alignment correction |
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