针对典型临床方案对四台64层计算机断层扫描设备进行性能评估。

Performance assessment of four 64-slice computed tomographic devices for a typical clinical protocol.

作者信息

Colli Vittoria, Mangini Monica, Strocchi Sabina, Lumia Domenico, Canì Andrea, Boffano Carlo, Cesarani Federico, Rizzi Elisa, Ferrara Rosa Maria, Andreis Ivo Andrea Bergamo, Bruno Jolanda, Gozzi Gino, Cacciatori Marco, Ostinelli Angelo, Vite Cristina, Conte Leopoldo, Fugazzola Carlo

机构信息

Fisica Sanitaria, Ospedale di Circolo di Varese e Fondazione Macchi, Varese, Italy.

出版信息

J Comput Assist Tomogr. 2011 Jan-Feb;35(1):57-64. doi: 10.1097/RCT.0b013e3181f124fe.

DOI:10.1097/RCT.0b013e3181f124fe

PMID:21150451

Abstract

OBJECTIVE

To compare the performances of four 64-slice CT devices, as regards radiation dose and image quality.

METHODS

Effective dose was measured with thermoluminescent dosimeters in an Alderson Rando phantom (Alderson Research Laboratories, New York, NY). Quantitative image quality was evaluated in a Catphan 600 phantom (The Phantom Laboratory, New York, NY) using 3 parameters (modulation transfer function, contrast-to-noise ratio, and figure of merit). Effective and main organ doses were measured in 40 patients (10 for each CT device), who underwent an abdominal study with the same standard protocol; moreover, in these patients, clinical image quality, using a 5-grade quality score, was assessed.

RESULTS

In-phantom measured doses and quantitative image quality showed some differences among the 4 devices. On the contrary, effective and organ doses provided to the patients were similar; no statistically significant differences were found also for clinical image quality.

CONCLUSIONS

Some differences were found among the 4 devices from a physical point of view; on the other hand, the patient data were similar.

摘要

目的

比较4台64层CT设备在辐射剂量和图像质量方面的性能。

方法

使用热释光剂量计在Alderson Rando体模（纽约州纽约市Alderson研究实验室）中测量有效剂量。在Catphan 600体模（纽约州纽约市体模实验室）中使用3个参数（调制传递函数、对比噪声比和品质因数）评估定量图像质量。对40例患者（每种CT设备10例）进行腹部检查，采用相同的标准方案，测量有效剂量和主要器官剂量；此外，对这些患者的临床图像质量采用5级质量评分进行评估。