TY - JOUR
T1 - Digital zoom is a useful, simple, and cost-effective method of reducing radiation exposure in percutaneous coronary intervention
AU - Hasegawa, Kenji
AU - Umemoto, Norio
AU - Inoue, Sho
AU - Iio, Yuri
AU - Shibata, Naoki
AU - Mizutani, Takashi
AU - Sawamura, Akinori
AU - Sugiura, Tsuyoshi
AU - Taniguchi, Toshio
AU - Asai, Toru
AU - Yamada, Michiharu
AU - Ishii, Hideki
AU - Murohara, Toyoaki
AU - Shimizu, Kiyokazu
N1 - Publisher Copyright:
© 2020, Japanese Association of Cardiovascular Intervention and Therapeutics.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - Reducing radiation exposure is a very important issue in interventional cardiology techniques such as percutaneous coronary intervention. Although novel techniques to reduce radiation exposure are valuable, we should also reconsider older techniques. Digital zoom has been available in Japan from 2005. Digital zoom enlarges an 8-inch field of view (FOV) by 1.2 times, allowing visualization of a 6.7-inch FOV without FOV switching. We identified 2101 suitable cases of percutaneous intervention (PCI) and divided them into two groups according to the use of digital zoom; 1195 patients were included in the digital zoom group and 906 patients in the conventional group. We collected data regarding the reference air kerma (RAK) and dose-area product (DAP). We calculated RAK and DAP per minute fluoroscope time (RAK/min, DAP/min, respectively). There were intergroup differences in RAK, DAP, RAK/min, and DAP/min (digital zoom group vs conventional group; RAK, 1590 mGy [990–2410] vs 1850 [1220–2720], p ' 0.01, RAK/min; 54.7 mGy/min [38.5–73.2] vs 71.2 [51.5–93.0], p ' 0.01; DAP, 16,000 cGy × cm2 [10,300–24,400] vs 20,700 [13,400–29,500], p ' 0.001; DAP/min, 557 cGy × cm2/min [392–737] vs 782 [571–1010], p ' 0.01, respectively). Because of baseline differences between the two groups, we performed propensity score matching. Even after score matching, there were intergroup differences in DAP, DAP/min, RAK, and RAK/min. Furthermore, the least squares method showed that digital zoom is a significant predictor of RAK (β = 0.14, p ' 0.01) and DAP (β = 0.20, p ' 0.01). Digital zoom is an older cost-effective technique that can significantly reduce radiation exposure in PCI.
AB - Reducing radiation exposure is a very important issue in interventional cardiology techniques such as percutaneous coronary intervention. Although novel techniques to reduce radiation exposure are valuable, we should also reconsider older techniques. Digital zoom has been available in Japan from 2005. Digital zoom enlarges an 8-inch field of view (FOV) by 1.2 times, allowing visualization of a 6.7-inch FOV without FOV switching. We identified 2101 suitable cases of percutaneous intervention (PCI) and divided them into two groups according to the use of digital zoom; 1195 patients were included in the digital zoom group and 906 patients in the conventional group. We collected data regarding the reference air kerma (RAK) and dose-area product (DAP). We calculated RAK and DAP per minute fluoroscope time (RAK/min, DAP/min, respectively). There were intergroup differences in RAK, DAP, RAK/min, and DAP/min (digital zoom group vs conventional group; RAK, 1590 mGy [990–2410] vs 1850 [1220–2720], p ' 0.01, RAK/min; 54.7 mGy/min [38.5–73.2] vs 71.2 [51.5–93.0], p ' 0.01; DAP, 16,000 cGy × cm2 [10,300–24,400] vs 20,700 [13,400–29,500], p ' 0.001; DAP/min, 557 cGy × cm2/min [392–737] vs 782 [571–1010], p ' 0.01, respectively). Because of baseline differences between the two groups, we performed propensity score matching. Even after score matching, there were intergroup differences in DAP, DAP/min, RAK, and RAK/min. Furthermore, the least squares method showed that digital zoom is a significant predictor of RAK (β = 0.14, p ' 0.01) and DAP (β = 0.20, p ' 0.01). Digital zoom is an older cost-effective technique that can significantly reduce radiation exposure in PCI.
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U2 - 10.1007/s12928-020-00639-5
DO - 10.1007/s12928-020-00639-5
M3 - Article
C2 - 31939067
AN - SCOPUS:85077856966
SN - 1868-4300
VL - 35
SP - 353
EP - 360
JO - Cardiovascular Intervention and Therapeutics
JF - Cardiovascular Intervention and Therapeutics
IS - 4
ER -