Radiation dosimetry at CT fluoroscopy: physician's hand dose and development of needle holders

Radiology. 1996 Nov;201(2):576-8. doi: 10.1148/radiology.201.2.8888264.


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.

MeSH terms

  • Biopsy, Needle / instrumentation*
  • Fluoroscopy*
  • Hand / radiation effects*
  • Humans
  • Radiation Dosage
  • Radiography, Interventional
  • Radiometry*
  • Tomography, X-Ray Computed*