title: [Diagnostic detection performance of a simulated nodule in chest computed tomography images and gray and color nuclear medicine images: comparison between a medical liquid crystal display monitor and an ordinary liquid crystal display monitor].
abstract: The purpose of this study was to evaluate the detection performance of simulated nodules in chest computed tomography (CT) images and nuclear medicine images with an ordinary liquid crystal display (LCD) and a medical LCD (grayscale standard display function: GSDF) and gamma 2.2. We collected 72 chest CT image slices obtained from an LSCT phantom with simulated signals composed of various sizes and CT values and 78 slices of monochrome and color nuclear medicine images obtained from a digital phantom with a simulated signal composed of various sizes and radiation levels. Six observers performed receiver operating characteristic (ROC) analysis using a continuous scale. The area under the ROC curve (AUC) was calculated for each monitor. The average AUC values for detection of chest CT images on a medical LCD (GSDF), medical LCD (gamma 2.2), and ordinary LCD were 0.71, 0.67, and 0.73, respectively. The average AUC values for detection of monochrome nuclear medicine images using a medical LCD (GSDF), medical LCD (gamma 2.2), and ordinary LCD were 0.81, 0.75, and 0.72, respectively. The average AUC values for detection of color nuclear medicine images on a medical LCD (GSDF), medical LCD (gamma 2.2), and ordinary LCD were 0.88, 0.86, and 0.90, respectively. Observer performance for detection of simulated nodules in chest CT images and nuclear medicine images was not significantly different between the three LCD monitors. We therefore conclude that an ordinary LCD monitor can be used to detect simulated nodules in chest CT images and nuclear medicine images.
authors.affiliation: Department of Medical Radiological Technology, Kagoshima Medical Technology College.
authors.forename: Eiichiro
authors.initials: E
authors.lastname: Okumura
authors.forename: Riyou
authors.initials: R
authors.lastname: Kamimae
authors.forename: Kenta
authors.initials: K
authors.lastname: Miyashita
authors.forename: Rina
authors.initials: R
authors.lastname: Ueda
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Kanmae
authors.forename: Mikayo
authors.initials: M
authors.lastname: Kubo
authors.forename: Natsumi
authors.initials: N
authors.lastname: Shirasaka
authors.forename: Taiki
authors.initials: T
authors.lastname: Takeda
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Hashimoto
mesh_terms: D016288:Computer Terminals; D006801:Humans; D050866:Liquid Crystals; D019047:Phantoms, Imaging; D012372:ROC Curve; D011856:Radiographic Image Enhancement; D013902:Radiography, Thoracic / Q000295:instrumentation*; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*