Detectability of BI-RADS category 3 or higher breast lesions and reading time on mammography: comparison between 5-MP and 8-MP LCD monitors

Abstract

Background Five-megapixel (MP) displays are recommended as soft copy devices for digital mammogram. An 8-MP liquid crystal display (LCD) (two 4-MP displays within one display) might offer the advantage of being able to view biplane mammography more easily than the dual planes of 5-MP LCDs. Purpose To compare detectability of Breast Imaging Reporting and Data System (BI-RADS) category 3 or higher lesions and reading time on mammography between 5- MP and 8-MP LCDs. Material and Methods The mammograms of 240 breasts of 120 patients including 60 breasts with BI-RADS category 3 or higher lesions and 180 breasts with normal or category 2 lesions were enrolled. All bilateral mammograms were displayed on bifacial 5-MP LCDs or an 8-MP LCD (two 4-MP displays within one display). Six radiologists assessed 240 breasts on each display. The observations were analyzed using receiver operating characteristic (ROC) analysis. A jack-knife method was used for statistical analysis. We employed a paired t-test to determine whether any significant differences existed in the reading time between two different displays. A P value < 0.05 was considered significant. Results The mean areas under the ROC curve obtained using 5-MP and 8-MP LCDs were 0.925 and 0.915, respectively, and there was no significant difference ( P = 0.46). There was also no significant difference in the reading time between two types of displays (57.8 min. vs. 51.5 min, P = 0.39). Conclusion The detectability of BI-RADS category 3 or higher lesions and reading time using an 8-MP LCD were comparable to those using a 5-MP LCD.

Mammography cancer detection: comparison of single 8MP and pair of 5MP reporting monitors

“…When quadrant view was used in addition to full field view, there was no statistically significant difference in the JAFROC figure of merit between the two types of display, for both masses and calcification clusters. Our findings are consistent with those of other smaller studies 5,6 where observers were allowed to compensate for the reduction in resolution of displays by using magnified views.…”

“…This study involved a greater number of .and cases than other studies investigating the effect of monitor type on cancer detection 5,6 and the number of readers and cases is similar to other observer performance studies designed to test performance of breast screening technology. [17][18][19] However, this study, in common with other observer performance studies, is inherently limited by the number of observers and cases available.…”

“…With 6 observers reading 60 cases (20 with calcification clusters, 20 with masses and 20 normal), no significant difference was found in diagnostic accuracy between the two displays. A study by Yabuuchi et al 6 which employed 6 observers to view 120 cases (30 cancers, 90 normal), found no significant difference in diagnostic accuracy.…”

Initial clinical evaluation of observer performance using a tablet computer with a 4K high-resolution display for detection of breast cancer by digital mammography

“…High-grade (so-called medical purpose) LCDs, such as the 5-megapixel (MP) LCD, are recommended for soft-copy reading in digital mammography [10][11][12].…”

BI-RADS 3 — Observation or Action? (lecture)

“…Так, Yabuuchi H. и др. (2016) использовали компьютерные дисплеи с разным разрешением [14]. Результаты с использованием 8-мегапиксельного жидкокристаллического дисплея (ЖК-) дисплея были сопоставимы с таковыми при использовании 5-мегапиксельного ЖК-дисплея.…”