USEFULNESS OF DUAL-ENERGY COMPUTED TOMOGRAPHY IN DETERMINING THE MINERALOGICAL COMPOSITION OF STONES INSIDE THE ORGANS

被引：0

作者：

Sapikowska, A. ^{[1
]}

Kisielewicz, K. ^{[1
]}

Wos, Z. ^{[1
]}

Mazur, L. ^{[1
]}

Kieltyka, B. ^{[1
]}

Dziecichowicz, A. ^{[1
]}

机构：

[1] Maria Sklodowska Curie Mem Inst Oncol, Ctr Oncol, Krakow Branch, Garncarska 11, PL-31115 Krakow, Poland

来源：

ACTA PHYSICA POLONICA B | 2019年 / 50卷 / 03期

关键词：

CT;

D O I：

10.5506/APhysPolB.50.711

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Computed tomography is a method of diagnostic radiology. The latest trend in the field of imaging using X-ray is multi-energy tomography, wherein a patient is scanned simultaneously by two energies: high (140 keV) and low (80 keV). In single-energy tomography, image in a given voxel is based on ascribing to that specific voxel value of Hounsfield Unit (HU). HU value is obtained from linear absorption coefficient in the patient's body. Hounsfield units may, however, imprecisely reflect the composition of the structure under study, due to the effect of beam hardening. This causes the scanned field, despite its homogeneous structure, to have different CT values for different layers. The aim of this study was to evaluate the usefulness of dual-energy CT in determining the mineralogical composition of organs stones. The results obtained from the dual-energy computed tomography (DECT) were compared with the effective atomic number calculated during the IR measurements. The research material were 11 kidney stones and 16 gallstones. They were divided into 18 groups. In order to perform tomographic scans, each of the stones was placed in a phantom made of plexiglass. Then, decomposition of the stones was analyzed using infrared spectrometry.

引用

页码：711 / 718

页数：8

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