Consumer color display may be suitable for radiographic image review

CHICAGO - A consumer flat-panel color display from Dell may be able to handle primary interpretation of radiography studies, according to researchers from Massachusetts General Hospital in Boston.

The Dell display is probably reasonable for primary interpretation of radiographs, according to Dr. David Hirschorn. He presented his group's research findings at the 2006 RSNA meeting.

Following up on a presentation at the 2005 RSNA meeting that found regular consumer LCD displays to be equivalent to grayscale displays for CT applications, the research team compared a dual 24-inch, 2.3-megapixel color LCD (Dell 2405) with 400 cd/m2 of brightness and a dual 21-inch, 3-megapixel grayscale LCD (Planar Systems, Beaverton, OR) with 500 cd/m2 of brightness.

Both systems were running Impax workstation software (Agfa HealthCare, Greenville, SC) and calibrated to the DICOM part 14 grayscale display function, Hirschorn said.

The study team selected 121 radiography exams including 30 normal case and 91 selected for subtle findings. All cases were first read on the Dell 2405 display by two attending radiologists, who recorded all findings and rated each finding for conspicuity on a scale of 1 to 5. A month later, the same radiologists read the cases in random order on the grayscale display.

The same findings with the same degree of conspicuity were found in 117 of the 121 cases, according to Hirschorn. The cases seen on the medical-grade display but not on the consumer display included two rib fractures and one distal phalangeal erosion.

Cases missed on the medical-grade display but seen on the Dell 2405 included one medial malleolar fracture and one 1.0-cm right lower lobe (RLL) pulmonary nodule, he said.

The differences between the displays were not statistically significant, Hirschorn said.

By Erik L. Ridley staff writer
November 30, 2006

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