Radiation dosimetry at CT fluoroscopy: physician's hand dose and development of needle holders.
The radiation dose to physicians' hands without and with use of needle holders was determined at 10 computed tomography (CT) fluoroscopy-guided transthoracic needle biopsies. As measured with ionization chambers (tube voltage, 80 kVp; tube current, 30 mA), the mean absorbed dose rate without and with holders was 1.14 mGy/sec +/- 0.02 (standard deviation) and 0.019 mGy/sec +/- 0.001, respectively. The mean duration of CT fluoroscopy was 59 seconds in 10 biopsies performed with a holder and 82 seconds in 10 biopsies performed without a holder (difference not statistically significant). The needle holders did not cause any artifacts that interfered with the biopsy procedure.
Kato
R
R
Department of Radiology, Fujita Health University School of Medicine, Aichi, Japan.
Katada
K
K
Anno
H
H
Suzuki
S
S
Ida
Y
Y
Koga
S
S
D001707:Biopsy, Needle / Q000295:instrumentation*; D005471:Fluoroscopy; D006225:Hand / Q000528:radiation effects*; D006801:Humans; D011829:Radiation Dosage; D015641:Radiography, Interventional; D011874:Radiometry; D014057:Tomography, X-Ray Computed