Film mark-point-free automatic positioning method

An automatic positioning, marker-free technology, applied in the field of medical imaging, can solve the problems of film displacement, position error, analysis data distortion, etc., and achieve the effect of avoiding errors

Active Publication Date: 2013-10-16
BEIJING ZHONGKANGLIAN MEDICAL EQUIP DEV
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Problems solved by technology

In the above-mentioned second method, although the holes pierced on the film and the traces of the marking pen on the film do not affect the dose calculation, errors will occur due to the difference in manual operation methods. In addition, these two positioning methods place marks on the film Film displacement may occur after exposure and before exposure, resulting in positional errors, resulting in severe distortion of analytical data

Method used

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  • Film mark-point-free automatic positioning method
  • Film mark-point-free automatic positioning method
  • Film mark-point-free automatic positioning method

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Embodiment Construction

[0031] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as figure 1 As shown, the present invention provides a method for automatic positioning of film without marker points, comprising the following steps: loading film dose data and planning data corresponding to the level of film dose data; obtaining data with the same pixel size as the planning data through interpolation; selecting the focus area; through translation and rotation operations, find the best matching area of ​​the area of ​​interest in the planning data, and obtain the translation parameters and rotation angle; according to the translation parameters, rotation angle and interpolated scaling information, perform direction operations on the original film dose data to obtain Data that matches planned data. The following is a detailed description of this.

[0033] Firstly, the steps of loading t...

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Abstract

The invention discloses a film mark-point-free automatic positioning method. The method comprises the following steps: loading film dosage data and plan data corresponding to the film dosage data; obtaining data having the same pixel dimension as the plan data through interpolation; selecting a focus area; searching for an optimum coupling area of the focus area in the plan data through translation and rotation operation and obtaining a translation parameter and a rotation angle; and performing, according to the translation parameter, the rotation angle and the zoom information of the interpolation, directional operation on the film dosage data and obtaining data coupling to the plan data. By using the method provided by the invention, errors caused by manual operation in a registering process can be effectively prevented.

Description

technical field [0001] The invention relates to a method for positioning a film without a marking point, in particular to a method for automatically positioning a film without a marking point in intensity-modulated conformal radiation therapy, and belongs to the technical field of medical imaging. Background technique [0002] Radiation therapy, chemotherapy and surgery are the three major technical means to treat tumors. With the rapid development of computer technology and imaging, radiation therapy has undergone tremendous changes, from two-dimensional traditional radiation therapy before the 1970s to three-dimensional conformal radiation therapy (3D for short) in the 1980s. -CRT), to the intensity modulated radiation therapy (IMRT for short), which has emerged in recent years, radiation therapy has entered the era of precise radiation therapy from the era of extensive dose control and fuzzy dose distribution. [0003] In the process of intensity-modulated radiation ther...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T3/00A61B6/00A61N5/00
Inventor 张可戴建荣张中柱王惠清闫秀芬谢玲灵
Owner BEIJING ZHONGKANGLIAN MEDICAL EQUIP DEV
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