Experimental estimates of peak skin dose and its relationship to the CT dose index using the CTDI head phantom

被引：3

作者：

de las Heras, Hugo ^{[1
]}

Minniti, Ronaldo ^{[2
]}

Wilson, Sean ^{[3
]}

Mitchell, Chad ^{[3
]}

Skopec, Marlene ^{[4
]}

Brunner, Claudia C. ^{[1
]}

Chakrabarti, Kish ^{[1
]}

机构：

[1] US FDA, Silver Spring, MD 20993 USA

[2] NIST, Gaithersburg, MD 20899 USA

[3] Walter Reed Natl Mil Med Ctr, Bethesda, MD 20889 USA

[4] NIH, Bethesda, MD 20892 USA

来源：

RADIATION PROTECTION DOSIMETRY | 2013年 / 157卷 / 04期

关键词：

PERFUSION COMPUTED-TOMOGRAPHY; CORONARY-ANGIOGRAPHY; RADIOCHROMIC FILM; ENERGY-DEPENDENCE; DOSIMETRY; PATIENT;

D O I：

10.1093/rpd/nct171

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A straightforward method is presented to estimate peak skin doses (PSDs) delivered by computed tomography (CT) scanners. The measured PSD values are related to the well-known volume CT dose index (CTDIvol), displayed on the console of CT scanners. PSD measurement estimates were obtained, in four CT units, by placing radiochromic film on the surface of a CTDI head phantom. Six different X-ray tube currents including the maximum allowed value were used to irradiate the phantom. PSD and CTDIvol were independently measured and later related to the CTDIvol value displayed on the console. A scanner-specific relationship was found between the measured PSD and the associated CTDIvol displayed on the console. The measured PSD values varied between 27 and 136 mGy among all scanners when the routine head scan parameters were used. The results of this work allow relating the widely used CTDIvol to an actual radiation dose delivered to the skin of a patient.

引用

页码：536 / 542

页数：7

共 40 条

[21] Estimation of the peak entrance surface air kerma for patients undergoing computed tomography-guided procedures [J].