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Detection of Pulmonary Edema in Pigs: Storage Phosphor versus Amorphous Selenium-based Flat-Panel-Detector Radiography¹

¹ From the Dept of Radiology, Samsung Med Ctr, Sungkyunkwan Univ School of Med, Seoul, Korea (T.S.K.); Dept of Radiology, Seoul National Univ Coll of Med and Institute of Radiation Med, Seoul National University Med Research Ctr, 28 Yongon-dong, Chongro-gu, Seoul 110-744, Korea (J.G.I., J.M.G., K.H.L., Y.J.L., S.H.K.); and Samsung Biomedical Research Institute, Samsung Med Ctr, Seoul, Korea (S.K.). Received Jun 20, 2001; revision requested Aug 13; revision received Sep 19; accepted Oct 16. Supported in part by grant HMP-98-G-1-014 of the Highly Advanced National Project, Ministry of Health and Welfare, Republic of Korea. Address correspondence to J.G.I. (e-mail: imjg@radcom.snu.ac.kr).

View larger version (141K): [in a new window]   Figure 1a. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section (1.0-mm collimation) CT scan of normal lung in a prone pig (thin-section CT grade 0) that were printed from PACS workstation monitor. Lungs are clear in all images.

View larger version (142K): [in a new window]   Figure 1b. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section (1.0-mm collimation) CT scan of normal lung in a prone pig (thin-section CT grade 0) that were printed from PACS workstation monitor. Lungs are clear in all images.

View larger version (181K): [in a new window]   Figure 1c. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section (1.0-mm collimation) CT scan of normal lung in a prone pig (thin-section CT grade 0) that were printed from PACS workstation monitor. Lungs are clear in all images.

View larger version (129K): [in a new window]   Figure 2a. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section CT scan in a prone pig with mild pulmonary edema (thin-section CT grade 2) that were printed from PACS workstation monitor. Note subtle patchy increased opacity (arrow) in both lungs in a and b. (c) Thin-section CT scan shows multifocal small areas of centrilobular ground-glass attenuation (arrows).

View larger version (128K): [in a new window]   Figure 2b. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section CT scan in a prone pig with mild pulmonary edema (thin-section CT grade 2) that were printed from PACS workstation monitor. Note subtle patchy increased opacity (arrow) in both lungs in a and b. (c) Thin-section CT scan shows multifocal small areas of centrilobular ground-glass attenuation (arrows).

View larger version (180K): [in a new window]   Figure 2c. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section CT scan in a prone pig with mild pulmonary edema (thin-section CT grade 2) that were printed from PACS workstation monitor. Note subtle patchy increased opacity (arrow) in both lungs in a and b. (c) Thin-section CT scan shows multifocal small areas of centrilobular ground-glass attenuation (arrows).

View larger version (151K): [in a new window]   Figure 3a. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section CT scan in a prone pig with severe pulmonary edema (thin-section CT grade 4) that were printed from PACS workstation monitor. Note widespread haziness in both lungs in a and b. (c) Thin-section CT scan also shows widespread areas of ground-glass attenuation.

View larger version (152K): [in a new window]   Figure 3b. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section CT scan in a prone pig with severe pulmonary edema (thin-section CT grade 4) that were printed from PACS workstation monitor. Note widespread haziness in both lungs in a and b. (c) Thin-section CT scan also shows widespread areas of ground-glass attenuation.

View larger version (179K): [in a new window]   Figure 3c. Transverse (a) computed radiograph, (b) selenium-based digital radiograph, and (c) thin-section CT scan in a prone pig with severe pulmonary edema (thin-section CT grade 4) that were printed from PACS workstation monitor. Note widespread haziness in both lungs in a and b. (c) Thin-section CT scan also shows widespread areas of ground-glass attenuation.

View larger version (58K): [in a new window]   Figure 4. True-positive rate of computed radiography (white bars) and selenium-based digital radiography (black bars) for the detection of pulmonary edema determined with thin-section CT (HRCT). 1 = grade 1, minimal edema (1%-10% in area of ground-glass attenuation determined with visual estimation); 2 = grade 2, mild edema (11%-40%); 3 = grade 3, moderate edema (41%-70%); 4 = grade 4, severe edema (>70%).

View larger version (37K): [in a new window]   Figure 5. False-negative rate of computed radiography (white bars) and selenium-based digital radiography (black bars) for the detection of pulmonary edema determined with thin-section CT (HRCT). Grades of pulmonary edema same as in Figure 4.