Interhospital observer agreement in interpretation of exercise myocardial Tc-99m tetrofosmin SPECT studies

Candell‐Riera, Jaume; Santana-Boado, César; Bermejo, Begoña; Armadans, Lluı́s; Castell, Joan Martí i; Casáns, Irene; Jurado, José Alfonso; Magriñá, J; Rosa, José Antônio

doi:10.1067/mnc.2001.110388

Cited by 16 publications

(4 citation statements)

References 32 publications

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“…12,13 Rest imaging was started 45 to 90 minutes after 1 single intravenous injection of 10 to 15 mCi of Tc-99m sestamibi. Pharmacologic stress test started 3 hours later by infusing dipyridamole (0.56 mg/kg) for 4 minutes.…”

Section: Methodsmentioning

confidence: 99%

“…Projection data were acquired over 180 grades anterior arc, from 45 grades left posterior oblique view to 45 grades right anterior oblique view, for 64 projections at 20 seconds per projection. [12][13][14] SPECT images were displayed as polar maps and qualitatively and quantitative analyzed according to the Cedars Sinai method 14 by an experienced nuclear cardiologist and nuclear medical doctor. SPECT studies were considered positive for myocardial ischemia when mild, moderate, or severe defect was present in at least 2 or 3 axes or in 3 consecutive tomographic sections on the same axis of the images obtained during the stress test and normal uptake at rest.…”

Section: Methodsmentioning

confidence: 99%

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Metabolic Syndrome and Ischemic Heart Disease in Gout

Vázquez‐Mellado

García-García²,

Vázquez³

et al. 2004

JCR: Journal of Clinical Rheumatology

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Metabolic Syndrome and Ischemic Heart Disease in Gout

Vázquez‐Mellado

García-García²,

Vázquez³

et al. 2004

JCR: Journal of Clinical Rheumatology

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“…Myocardial and brain perfusion single photon emission computed tomography (SPECT) generates nuclear medicine images using color and grayscales . However, differences between gray and color scales might affect image interpretation, and manufacturers have created various several color scales, the choice of which affects diagnostic accuracy …”

Section: Introductionmentioning

confidence: 99%

Impact of calibration methods for color medical displays on interpreting brain SPECT images

et al. 2019

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Purpose Color images are visualized on medical monitors that are adjusted by a grayscale standard display function (GSDF) or γ2.2. Although the GSDF is visually displayed as a linear graded grayscale, it does not specify how color medical images should be presented. On the other hand, the usual gamma setting for color images is γ2.2, but it has not been standardized. The color standard display function (CSDF) has recently been proposed as a standardized gamma setting for color medical monitors. However, the influence of various gamma settings on image characteristics should be determined. The present study aimed to identify differences in color‐scale characteristics on nuclear medicine images displayed on medical monitors adjusted by CSDF, GSDF, and γ2.2. Methods Transverse normal (n = 1) and abnormal (n = 5) brain perfusion images were generated using a mathematical digital phantom. Transverse phantom and clinical brain images are shown using the clinically applied eight‐color scale. Five nuclear medicine experts visually assessed phantom and clinical images using a defect severity scale that ranged from zero (no defect) to four (defect). Receiver operating characteristic curves were created and areas under the curves (AUCs) were analyzed. Defect scores for the clinical study were evaluated in the nine segments on basal ganglia slice, and defect scores were summed for each patient. Results The average defect score for color A significantly differed in multiple comparison tests, but not in post hoc tests. The ranges of AUC for CSDF, GSDF, and γ2.2 were 0.86–0.94, 0.82–0.94, and 0.88–0.97, respectively. The AUCs of CSDF in all color scales did not significantly differ from other gamma settings. The summed defect scores of CSDF were similar to those of other gamma settings. Conclusion Nuclear medicine images were equally valid when adjusted by CSDF even at various gamma settings. Nuclear medicine images can be evaluated equally using any gamma setting. Nonetheless, the color gamma setting for medical monitors should be standardized.

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“…63 N For ECG gated and ungated studies, if automatic edge detection is used the computer derived edges should be inspected to ensure that they have been correctly defined. Incorrectly defined endocardial and epicardial borders will lead to wrong volume and ejection fraction calculations, and to incorrect polar displays and quantification.…”

Section: Tomogram Displaymentioning

confidence: 99%