摘要:

Quantitative external counting methods for thein vivodetermination of the activity uniformly distributed in an area of interest (lesion) have been developed. The theoretical work has been extended to include the effects of regions of differing attenuation coefficient and of non‐target organ activity in the tissue surrounding the lesion. A clinical quantitative procedure utilizing a “calibrated” gamma camera and associated computer system is described. Studies including a bone substitute material in a water phantom confirmed the basic theoretical work.

ISSN:0269-3127    

DOI:10.1118/1.594287

出版商:American Association of Physicists in Medicine    

年代:1998

数据来源: WILEY

摘要:

Tumor cells can be killed by heating to 42.5°C. It is convenient to localize heating by passing electric current at 500 kHz through tissue between a pair of electrodes. It is desirable to determine, for a given electrode–tissue configuration, what the resulting field and, therefore, current distribution will be. A computer program FFEARS was used to calculate electric field and potential distributions in two dimensions for three simple cases.

ISSN:0269-3127    

DOI:10.1118/1.594235

出版商:American Association of Physicists in Medicine    

年代:1998

数据来源: WILEY

摘要:

A real‐time display system has been designed and tested for use with a radiation field monitor. The system uses only pulse and waveform generators, a multiplexer, and an oscilloscope. The display consists of either a three‐dimensional representation of the field intensity distribution or a series of simultaneous profiles.

ISSN:0269-3127    

DOI:10.1118/1.594236

出版商:American Association of Physicists in Medicine    

年代:1998

数据来源: WILEY

ISSN:0269-3127    

DOI:10.1118/1.594237

出版商:American Association of Physicists in Medicine    

年代:1998

数据来源: WILEY

ISSN:0269-3127    

DOI:10.1002/j.2473-4209.1976.tb36072.x

出版商:Wiley    

年代:1998

数据来源: WILEY