Bottigli U, Golosio B, Masala G L, Oliva P, Stumbo S, Delogu P, Fantacci M E, Abbene L, Fauci F, Raso G
Struttura Dipartimentale di Matematica e Fisica dell'Università degli Studi di Sassari and Sezione I.N.F.N., Cagliari, Italy.
Med Phys. 2006 Sep;33(9):3469-77. doi: 10.1118/1.2229431.
We describe a portable system for mammographic x-ray spectroscopy, based on a 2 X 2 X 1 mm3 cadmium telluride (CdTe) solid state detector, that is greatly improved over a similar system based on a 3 X 3 X 2 mm3 cadmium zinc telluride (CZT) solid state detector evaluated in an earlier work. The CdTe system utilized new pinhole collimators and an alignment device that facilitated measurement of mammographic x-ray spectra. Mammographic x-ray spectra acquired by each system were comparable. Half value layer measurements obtained using an ion chamber agreed closely with those derived from the x-ray spectra measured by either detector. The faster electronics and other features of the CdTe detector allowed its use with a larger pinhole collimator than could be used with the CZT detector. Additionally, the improved pinhole collimator and alignment features of the apparatus permitted much more rapid setup for acquisition of x-ray spectra than was possible on the system described in the earlier work. These improvements in detector technology, collimation and ease of alignment, as well as low cost, make this apparatus attractive as a tool for both laboratory research and advanced mammography quality control.
我们描述了一种用于乳腺X射线光谱分析的便携式系统，该系统基于一个2×2×1立方毫米的碲化镉（CdTe）固态探测器，相较于早期工作中评估的基于一个3×3×2立方毫米的碲锌镉（CZT）固态探测器的类似系统有了很大改进。CdTe系统采用了新型针孔准直器和一种对准装置，便于测量乳腺X射线光谱。每个系统获取的乳腺X射线光谱具有可比性。使用电离室获得的半值层测量结果与通过任一探测器测量的X射线光谱得出的结果非常吻合。CdTe探测器更快的电子设备和其他特性使其能够使用比CZT探测器更大的针孔准直器。此外，该装置改进后的针孔准直器和对准特性使得获取X射线光谱的设置比早期工作中描述的系统要快得多。探测器技术、准直和对准便利性的这些改进，以及低成本，使得该装置作为实验室研究和先进乳腺摄影质量控制的工具具有吸引力。
