| 王明月,董军强,高剑波,刘杰,侯平.器官剂量调制技术在女性胸部CT成像中对乳腺的保护作用[J].中华放射医学与防护杂志,2016,36(7):530-533 |
| 器官剂量调制技术在女性胸部CT成像中对乳腺的保护作用 |
| Organ dose modulation in chest CT scan in female: protection of breasts |
| 投稿时间：2015-11-04 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.07.011 |
| 中文关键词: 器官剂量调制 体层摄影术,X射线计算机 辐射剂量 乳腺 |
| 英文关键词:Organ dose modulation Tomography, X-ray computer Radiation dosage Breast |
| 基金项目:河南省重点科技攻关计划项目（14210231093） |
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| 中文摘要: |
| 目的 探讨器官剂量调制（organ dose modulation，ODM）技术在女性胸部CT扫描中对乳腺区辐射剂量和图像质量的影响。方法 前瞻性收集临床需要行胸部CT检查的女性患者112例，按照检查的先后顺序将患者分为两组：对照组56例，采用常规平扫；试验组56例，平扫采用ODM技术。分析两组患者乳腺区域前、左、后、右4个方向的管电流分布情况，评价ODM对乳腺区域图像质量和辐射剂量的影响。结果 对照组患者前、后方向上管电流均为（128±43）mA，而试验组患者前方向上管电流较后方向管电流低（t=-18.701，P < 0.01）。试验组4个方向管电流均较对照组降低（t=11.71~20.22，P < 0.01）。试验组患者的容积CT剂量指数和有效剂量均较对照组降低（t=3.58、3.55，P < 0.05）。两组患者间图像质量的客观和主观评价指标差异均无统计学意义（P > 0.05）。结论 在女性胸部CT扫描时应用ODM技术，可以在不改变图像质量的前提下，降低乳腺区辐射剂量，保护敏感器官。 |
| 英文摘要: |
| Objective To study the effects of organ dose modulation (ODM) technique on dose reduction of the breasts and the related thoracic image quality in female chest CT. Methods One hundred and twelve female patients with chest CT were enrolled in this study and divided into two groups according to the order: control group(n=56, using conventional scan) and experimental group (n=56, using ODM technique). The tube currents in different directions (A/L/P/R) were analyzed in the two groups. The effects of ODM on the radiation dosage and image quality were assessed. Results The tube currents in anterior and posterior direction were both (128±43)mA in the control group. However, the tube current in the anterior was lower than that in the posterior in experimental group (t=-18.701, P < 0.01). The tube currents in all direction in the experimental group were all lower than those in the control group(t=11.71-20.22, P < 0.01). The CTDIvol and E in the experimental group were lower than those in the control group(t=3.58, 3.55, P < 0.05). There were no significant differences for the objective and the subjective scores between two groups (P > 0.05). Conclusions ODM technique could protect the female breasts by reducing the radiation dose without image quality degrading during chest CT scan. Trial registration Chinese clinical trial registry,ChiCTR-DOD-16008427 |
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