| 敖炜群1 孙静1△ 刘军1 沈昭在2 胡金文1 丁景峰1 谢进1.低剂量胸部CT 自动管电流调节技术在超重体型患者检查中的
可行性研究[J].,2014,14(2):292-295 |
| 低剂量胸部CT 自动管电流调节技术在超重体型患者检查中的
可行性研究 |
| Feasibility Study on the Low-dose Chest CT Use of Automatic Tube CurrentModulation in Overweight Patients |
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| DOI： |
| 中文关键词: 低剂量CT 自动管电流调节技术 超重体型 |
| 英文关键词: Low-dose CT Automatic tube current modulation Overweight |
| 基金项目: |
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| 中文摘要: |
| 摘要目的：探讨16 层螺旋CT自动管电流调节技术（CARE Dose 4D）在超重体型患者检查中的可行性。方法：收集行胸部CT 检
查的超重体型患者（BMI值于24-27.9 之间）100 例，扫描分低剂量组（A 组）和常规剂量组（B 组），其中A 组扫描运用CARE Dose
4D技术自动调节管电流；B 组扫描运用常规剂量管电流为70 mAs 扫描。扫描完成后记录加权CT 剂量指数(CTDlvol)、有效mAs
值、剂量长度乘积（DLP），计算出有效剂量（ED）及剂量减低比值（DR），并比较两组的剂量及图像质量。结果：与B 组相比，A 组常
规扫描辐射剂量显著降低，差异有显著统计学意义（P<0.01），A 组剂量减低比值（DR）降低约20.84%，而图像质量无明显下降，不
影响诊断，在主动脉弓上4 cm（肺尖）层面A 组图像质量优于B 组，差异有统计学意义(X2=8.442，P=0.015)。结论：自动管电流调节
技术既可以减少患者的辐射剂量，对待超重体型患者个体化、人性化，又不影响影像诊断，是一项有价值的检查方法。 |
| 英文摘要: |
| ABSTRACT Objective：To study the feasibility of 16 slice spiral CT use automatic tube current modulation (CARE Dose 4D) in
overweight patients. Methods：100 overweight patients (The value of body mass index in the 24 - 27.9). were collected and randomly
divided into low-dose group (group A) and routine group (group B), group A was treated by CARE Dose 4D to scan. Group B was
scanned with tube current of 70 mAs. After scanning, the volume CT dose index (CTDIvol), effective mAs, dose length product(DLP)
were recorded. The effective dose (ED) and the dose reduction (DR) were calculated. Furthermore, the radiation dose and image quality
were compared between two groups. Results：Compared with group B, the effective dose significantly reduced in groupA (P<0.01), the
dose reduction (DR) reduced about 20.48%, while obvious difference could not be found in the quality of images obtained fromgroup A
and group B. At the apex of the lung level, the image quality of group A was superior to groupB (X2 =8.442，P=0.015).Conclusion：
Automatic tube current modulation may not only reduce the radiation dose and make overweight patients' examination more
individualized and humanity, but also not affect the diagnosis results. It was a valuable diagnostic method. |
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