ISOTHERM MAPPING IN HYPERTHERMIA USING SUBTRACTION X-RAY COMPUTED-TOMOGRAPHY

被引：42

作者：

BENTZEN, SM

OVERGAARD, J

JORGENSEN, J

机构：

来源：

RADIOTHERAPY AND ONCOLOGY | 1984年 / 2卷 / 03期

关键词：

D O I：

10.1016/S0167-8140(84)80066-3

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

The prospects for the use of X-ray computed tomography (CT) for isotherm mapping were investigated. The spatial distribution of CT changes was obtained by digital subtraction of images taken before and during heating of a 200 mm diameter cylindrical 4% agar phantom. Due to a rather unfavorable signal-to-noise ratio, the noise level in the resulting image had to be reduced by low-pass filtering using the 2-dimensional Fast Fourier Transform followed by spatial averaging. The resulting isotherms showed a resolution of 0.5.degree. C at a spatial resolution of 4.2 mm. Isotherms so obtained are presented and the possibility of using the method in clinical hyperthermia [for cancer therapy in human] is discussed.

引用

页码：255 / 260

页数：6