Computing patient doses of x-ray examinations using a patient size- and sex-adjustable phantom
Computing patient doses of x-ray examinations using a patient size- and sex-adjustable phantom
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DOI：
10.1259/bjr.70.835.9245883
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发表时间：
1997-07-01
影响因子：
2.6
通讯作者：
Chervjakov, A
中科院分区：
文献类型：
--
作者：
Rannikko, S;Ermakov, I;Chervjakov, A
无论是传统的荧光透视的使用和现代数字技术在放射学和介入放射学中的越来越多的使用，都需要开发用于患者剂量确定的通用计算机程序。计算时间长限制了蒙特卡罗（MC）方法在放射学视图频繁变化的剂量监测应用中的使用。在器官剂量计算软件应用程序（ODS-60）中，体模模型在原理上与Alderson-Rando（A-R）体模相似，但其性别不同！尺寸和形状根据特定的患者而改变。器官和有效剂量是使用类似于放射治疗中使用的传统剂量计划系统的方法在线计算的（在几秒钟内）。本文详细介绍了新的ODS-60软件，并演示了其功能。通过将结果与独立方法的结果进行比较来确定软件性能。在参考男性尺寸的情况下，有效剂量比另一篇出版物中给出的有效剂量大约7%。在参考女性尺寸的女性的情况下，与其他方法的分歧更大（33%）。体模模型（ODS-60和MC）之间的解剖差异被认为是这些结果的主要原因。本文展示了使用患者体型和性别自适应体模进行患者剂量测定的优势;男性（170 cm，85 kg）和女性（160 cm，43 kg）之间的入射表面剂量与有效剂量比的转换系数在1.5-2范围内变化。
Both the use of traditional fluoroscopy and the increasing use of modern digital techniques in radiology and interventional radiology demand the development of versatile computer programs for patient dose determinations. Long computing times restrict the use of Monte Carlo (MC) methods in dose monitoring applications where the radiological views change frequently. In the Organ Doses Calculation Software application (ODS-60), the phantom model is similar in principle to the Alderson-Rando (A-R) phantom, but its sex! size and shape is modified according to a particular patient. Organ and effective doses are computed online (in a few seconds) using a method similar to the traditional dose planning systems used in radiotherapy. In this paper, the new ODS-60 software is presented in detail and its capabilities are demonstrated. Software performance was determined by comparing the results with those from independent methods. In the case of a reference man-sized male, the effective dose was about 7% larger than the effective dose given in another publication. In the case of a reference woman-sized female, the disagreement with the other method was greater (33%). Anatomical differences between the phantom models (ODS-60 and MC) were found to be the main reasons for these findings. This paper shows the advantage of using a patient size- and sex-adaptable phantom for patient dose determinations; the conversion coefficient from entrance surface dose-to-effective dose ratio between male (170 cm, 85 kg) and a female (160 cm, 43 kg) varies in the range 1.5-2.