TY - JOUR
T1 - Influence of monitor display resolution and displayed image size on the spatial resolution of ultra-high-resolution CT images
T2 - a phantom study
AU - Ikushima, Yoichiro
AU - Tokurei, Shogo
AU - Sato, Shusaku
AU - Ikushima, Kojiro
AU - Hashimoto, Noriyuki
AU - Morishita, Junji
AU - Yabuuchi, Hidetake
N1 - Funding Information:
J. Morishita received a research grant from the EIZO Corporation (Ishikawa, Japan). N. Hashimoto is a member of EIZO Corporation.
Funding Information:
The authors thank Mr. Masahiro Koike and Mr. Shohei Kudomi (Yamaguchi University Hospital, Ube, Japan) for his technical advice, and Dr. Seiichi Murakami, Dr. Yasuyuki Kawaji, Dr. Noriyuki Kuga, Dr. Yutaka Yoshida, Ms. Aiko Ohmaru, and Dr. Yuji Tsutsui (Junshin Gakuen University, Fukuoka, Japan) for participating in our observational experiments.
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Japanese Society of Radiological Technology and Japan Society of Medical Physics.
PY - 2022/6
Y1 - 2022/6
N2 - To determine the optimal display conditions for ultra-high-resolution computed tomography (UHRCT) images in clinical practice, this study investigated the effects of liquid–crystal display (LCD) resolution and displayed image size on the spatial resolution of phantom images acquired using a UHRCT system. A phantom designed to evaluate the high-contrast resolution was scanned. The scan data were reconstructed into four types of UHRCT image series consisting of the following possible combinations: two types of reconstruction kernels on the filtered back-projection method (for the lung and mediastinum) and two types of matrix sizes (10242 and 20482). These images were displayed under eight types of display conditions: three image sizes displayed on a 2-megapixel (MP) and 3-MP color LCD and two image sizes on an 8-MP color LCD. A total of 32 samples (four image series × eight display conditions) were evaluated by eight observers for high-contrast resolution. The high-contrast resolution of the displayed UHRCT images was significantly affected by the displayed image size, although the largest (full-screen) displayed image size did not necessarily show the maximum high-contrast resolution. When the images were displayed in the full-screen size, LCD resolution affected the high-contrast resolution of only the 20482-matrix-size images reconstructed using the lung kernel. In conclusion, the spatial resolution of UHRCT images may be affected by LCD resolution and displayed image size. To optimize the clinical display conditions for UHRCT images, it is necessary to adopt an LCD with an adequate resolution for each viewing situation.
AB - To determine the optimal display conditions for ultra-high-resolution computed tomography (UHRCT) images in clinical practice, this study investigated the effects of liquid–crystal display (LCD) resolution and displayed image size on the spatial resolution of phantom images acquired using a UHRCT system. A phantom designed to evaluate the high-contrast resolution was scanned. The scan data were reconstructed into four types of UHRCT image series consisting of the following possible combinations: two types of reconstruction kernels on the filtered back-projection method (for the lung and mediastinum) and two types of matrix sizes (10242 and 20482). These images were displayed under eight types of display conditions: three image sizes displayed on a 2-megapixel (MP) and 3-MP color LCD and two image sizes on an 8-MP color LCD. A total of 32 samples (four image series × eight display conditions) were evaluated by eight observers for high-contrast resolution. The high-contrast resolution of the displayed UHRCT images was significantly affected by the displayed image size, although the largest (full-screen) displayed image size did not necessarily show the maximum high-contrast resolution. When the images were displayed in the full-screen size, LCD resolution affected the high-contrast resolution of only the 20482-matrix-size images reconstructed using the lung kernel. In conclusion, the spatial resolution of UHRCT images may be affected by LCD resolution and displayed image size. To optimize the clinical display conditions for UHRCT images, it is necessary to adopt an LCD with an adequate resolution for each viewing situation.
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U2 - 10.1007/s12194-022-00656-4
DO - 10.1007/s12194-022-00656-4
M3 - Article
C2 - 35462583
AN - SCOPUS:85128652553
SN - 1865-0333
VL - 15
SP - 147
EP - 155
JO - Radiological Physics and Technology
JF - Radiological Physics and Technology
IS - 2
ER -