Measurement and Correction of Diagnostic X-ray Spectra Using a High Res olution Schottky Cdte Detector

• Maeda Koji

  Department of Clinical Radiology, Faculty of Health Sciences, Hiroshima International University Division of Allied Health Sciences, Graduate School of Medicine, Osaka University

• Matsumoto Masao

  Division of Allied Health Sciences, Graduate School of Medicine, Osaka University

• Taniguchi Akira

  TOYO MEDIC Co. Ltd.

• Kanamori Hitoshi

  Prof Emeritus, Kyoto Institute of Technology

Bibliographic Information

Other Title

• 高分解能Schottky Cdte検出器を用いた診断領域X線スペクトルの測定とその補正
• コウ ブンカイノウ Schottky CdTe ケンシュツキ オ モチイタ シンダン リョウイキ Xセン スペクトル ノ ソクテイ ト ソノ ホセイ

Abstract

The purpose of this study is to measure diagnostic x-ray spectra using a high resolution Schottky Cdte detector (TOYO MEDIC RAMTEC 413A) and to determine the best response function of Cdte detector for correcting the measured spectra with using a rise time discrimination (RTD) circuit to primary x-ray spectra. Since the measured spectra were distorted by the response of Cdte detector and did not present the true photon spectra, the correction by the stripping procedure was applied. The response function of Cdte detector has been determined by using Monte Carlo simulation method for calculating the photon interaction (K-escape, coherent scattering and Compton scattering) and incomplete charge collection by trapping of hole and use of RTD circuit. This simulation performed with various important factors (mean path length A h of hole and weight factor W, of incomplete charge collection) for finding the best response function. The photon spectra corrected with those various response functions were compared with the corrected photon spectra measured using a high purity Ge (HP-Ge) detector (PRINCETON GAMMA-TECH NIGP1013345), and the AI-attenuation curves calculated from corrected spectra and measured using the HPGe detector were compared. The best-fitted response function was determined, and the attenuation curves calculated from the spectra corrected with this response function were agreed with that measured using the HP-Ge detector within maximum error 0.03 of the attenuation rate and 5.0 % of the half value layer.

Journal

• Japanese Journal of Medical Physics

  Japanese Journal of Medical Physics 24 (2), 49-60, 2004

  Japan Society of Medical Physics

Keywords

• Diagnostic x-ray spectrum
• High resolution Schottky Cdte detector
• Monte Carlo simulation method
• Stripping procedure
• Rise time discrimination (RTD) circuit

Details

• CRID: 1390282679650259456
• NII Article ID: 10014056455
• NII Book ID: AA11580542
• DOI: 10.11323/jjmp2000.24.2_49
• COI: 1:STN:280:DC%2BD2cvnt1Grsg%3D%3D
• NDL BIB ID: 7087326
• ISSN: 13455354
• PubMed: 15383709
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7087326
• Web Site: https://search.jamas.or.jp/link/ui/2006087313
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • PubMed
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed