Evaluating the maximum patient radiation dose in cardiac interventional procedures

Mamoru Kato, Koichi Chida, Tadaya Sato, Hajime Oosaka, Tetsuo Tosa, Ken Kadowaki

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Many of the X-ray systems that are used for cardiac interventional radiology provide no way to evaluate the patient maximum skin dose (MSD). The authors report a new method for evaluating the MSD by using the cumulative patient entrance skin dose (ESD), which includes a back-scatter factor and the number of cineangiography frames during percutaneous coronary intervention (PCI). Four hundred consecutive PCI patients (315 men and 85 women) were studied. The correlation between the cumulative ESD and number of cineangiography frames was investigated. The irradiation and overlapping fields were verified using dose-mapping software. A good correlation was found between the cumulative ESD and the number of cineangiography frames. The MSD could be estimated using the proportion of cineangiography frames used for the main angle of view relative to the total number of cineangiography frames and multiplying this by the cumulative ESD. The average MSD (3.0±1.9 Gy) was lower than the average cumulative ESD (4.6±2.6 Gy). This method is an easy way to estimate the MSD during PCI.

Original languageEnglish
Article numberncq286
Pages (from-to)69-73
Number of pages5
JournalRadiation protection dosimetry
Issue number1
Publication statusPublished - 2011 Jan

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Public Health, Environmental and Occupational Health


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