Optimization of Exposure Condition and Photographic Techniques for Specimen and Devices in Neuroangiographic Suites

Park, Soonchan; Lim, Ok Kyun; Youn, Jin Ho; Kim, Tae il; Hwang, Seon Moon; Kim, Han Soo; Shim, Jaegeun; Kim, Eun Hye; Jeong, Yun Gyeong; Lee, Ha Young; Kim, Bohyun; Lee, Deok Hee; Suh, Dae Chul

Abstract

PURPOSE
We analyzed factors related to quality of photographs taken at neuroangiographic suites to optimize exposure condition.
MATERIALS AND METHODS
We used a camera (EOS-300D, Canon Inc., Tokyo) with a standard- (EF-S 18-55 mm F3.5-5.6 USM, Canon Inc., Tokyo) and a macro-lens (EF 100 mm f/2.8 Macro USM, Canon Inc., Tokyo). Photographs were taken at a light-booth (1000 lux) and 2 neuroangiographic suites (988 and 856 lux) under ordinary intensity of illumination. We took photographs of a test chart (ColorChecker, X-rite, Michigan) and Kodak Q-13 Grey Scale Card at different values of aperture and shutter speed with fixed ISO of 400 and assessed the quality of photographs by Blade Pro (V1.1, Image group, Seoul). We analyzed photographs of a device at 1/25-1/80 shutter speed and F12 - 20 apertures and compared the result and also made visual assessment.
RESULTS
Photographs of test chart and Grey Scale Card revealed that the best images chosen by Blade Pro were distributed in scattered range of quality which could help understand the range of optimum exposure condition but was not suitable for practical usage. We obtained reasonable quality photograph at shutter speed of 1/40 and aperture of F16 that can be used in 3 places.
CONCLUSION
The most appropriate exposure condition when taking photographs in neuroangiographic suites could be explored. To get an optimal image in limited illumination, it is mandatory to select a fast enough shutter speed to avoid motion artifacts and a sufficient aperture to actualize the subject depth.