Dosimetric impact of computed tomography calibration on a commercial treatment planning system for external radiation therapy

被引：76

作者：

Cozzi, L ^{[1
]}

Fogliata, A ^{[1
]}

Buffa, F ^{[1
]}

Bieri, S ^{[1
]}

机构：

[1] Osped San Giovanni, Dept Radiat Oncol, CH-6500 Bellinzona, Switzerland

来源：

RADIOTHERAPY AND ONCOLOGY | 1998年 / 48卷 / 03期

关键词：

Hounsfield units; electron density; treatment planning; computerized tomography;

D O I：

10.1016/S0167-8140(98)00072-3

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 [肿瘤学];

摘要：

The Hounsfield units into density conversion for a commercial treatment planning system (TPS) is discussed. The impact of an average calibration table provided by the manufacturer on computed doses was investigated when a customer calibration could not be included in the TPS. The maximum error determined on the computed monitor units per Gy was found to be about 2%, being below 1% on average. The relative importance of the parameters used for CT image acquisition is also discussed. The applied voltage was the most relevant parameter leading to errors in the reconstructed Hounsfield numbers of about 300 units for high densities. (C) 1998 Elsevier Science ireland Ltd. All rights reserved.

引用

页码：335 / 338

页数：4

共 10 条

[1]

AHNESJO A, 1992, MED PHYS, V19, P267

[2]

AHNESJO A, 1993, HELAX TMS USERS MANU

[3]

COMPTON SCATTER IMAGING OF TRANSVERSE SECTIONS - AN OVERALL APPRAISAL AND EVALUATION FOR RADIOTHERAPY PLANNING [J].

BATTISTA, JJ ;

BRONSKILL, MJ .

PHYSICS IN MEDICINE AND BIOLOGY, 1981, 26 (01) :81-99

[4]

AN ELECTRON-DENSITY CALIBRATION PHANTOM FOR CT-BASED TREATMENT PLANNING COMPUTERS [J].

CONSTANTINOU, C ;

HARRINGTON, JC ;

DEWERD, LA .

MEDICAL PHYSICS, 1992, 19 (02) :325-327

[5]

A METHOD FOR CONVERSION OF HOUNSFIELD NUMBER TO ELECTRON-DENSITY AND PREDICTION OF MACROSCOPIC PAIR PRODUCTION CROSS-SECTIONS [J].

KNOOS, T ;

NILSSON, M ;

AHLGREN, L .

RADIOTHERAPY AND ONCOLOGY, 1986, 5 (04) :337-345

[6]

ACCEPTANCE TESTING COMPUTERIZED RADIATION-THERAPY TREATMENT PLANNING SYSTEMS - DIRECT UTILIZATION OF CT SCAN DATA [J].

MCCULLOUGH, EC ;

HOLMES, TW .

MEDICAL PHYSICS, 1985, 12 (02) :237-242

[7]

THE RELATION BETWEEN X-RAY CT NUMBERS AND CHARGED-PARTICLE STOPPING POWERS AND ITS SIGNIFICANCE FOR RADIOTHERAPY TREATMENT PLANNING [J].

MUSTAFA, AA ;

JACKSON, DF .

PHYSICS IN MEDICINE AND BIOLOGY, 1983, 28 (02) :169-176

[8]

The calibration of CT Hounsfield units for radiotherapy treatment planning [J].

Schneider, U ;

Pedroni, E ;

Lomax, A .

PHYSICS IN MEDICINE AND BIOLOGY, 1996, 41 (01) :111-124

[9]

LUNG DOSE CALCULATIONS USING COMPUTERIZED-TOMOGRAPHY - IS THERE A NEED FOR PIXEL BASED PROCEDURES [J].

VANDYK, J .

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 1983, 9 (07) :1035-1041

[10]

VANDYK J, 1993, INT J RADIAT ONCOL, V26, P261, DOI 10.1016/0360-3016(93)90206-B

← 1 →