Comparison of liquid crystal versus cathode ray tube display for the detection of simulated chest lesions

Oschatz, Elisabeth; Prokop, Mathias; Scharitzer, Martina; Weber, Michael; Bálassy, Csilla; Schaefer-Prokop, Cornelia

doi:10.1007/s00330-004-2488-9

Cited by 23 publications

(14 citation statements)

References 13 publications

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“…Balassy et al showed equivalence of the overall quality of chest radiography between 5M CRT and 3M LCD [16]. Oschatz et al reported that 5M CRT and 3M LCD displays performed equivalently for the detection of simulated subtle pulmonary lesions [17]. To our knowledge, however, there has been no study describing the performance of observers reading mammograms on LCD monitors.…”

Section: Discussionmentioning

confidence: 95%

Detection of masses and microcalcifications of breast cancer on digital mammograms: comparison among hard-copy film, 3-megapixel liquid crystal display (LCD) monitors and 5-megapixel LCD monitors: an observer performance study

et al. 2006

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The purpose of the study was to compare observer performance in the detection of masses and microcalcifications of breast cancer among hard-copy reading and soft-copy readings using 3-megapixel (3M) and 5-megapixel (5M) liquid crystal display (LCD) monitors. For the microcalcification detection test, we prepared 100 mammograms: 40 surgically verified cancer cases and 60 normal cases. For the mass detection test, we prepared 100 mammograms: 50 cancer cases and 50 normal cases. After six readers assessed both microcalcifications and masses set for each modality, receiver operating characteristic (ROC) analysis was performed. The average A(z)s for mass detection using a hard copy and 3M and 5M LCD monitors were 0.923, 0.927 and 0.920, respectively; there were no significant differences. The average A(z) for microcalcification detection using hard copy, 3M and 5M LCD monitors was 0.977, 0.954 and 0.972, respectively. There were no significant differences, but the P-values between the hard copy and 3M LCD monitor and that between the 3M and 5M LCD monitor were 0.08 and 0.09, respectively. In conclusion, the observer performances for detecting masses of breast cancers were comparable among the hard copy and two LCD monitors; however, soft-copy reading with a 3M LCD monitor showed slightly lower observer performance for detecting microcalcifications of breast cancers than hard-copy or 5M LCD monitor reading.

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Section: Discussionmentioning

confidence: 95%

Detection of masses and microcalcifications of breast cancer on digital mammograms: comparison among hard-copy film, 3-megapixel liquid crystal display (LCD) monitors and 5-megapixel LCD monitors: an observer performance study

et al. 2006

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“…The conventional method to display digital radiographs has been on cathode-ray tubes, which currently still dominate the market (51). More recently, however, active-matrix liquidcrystal displays are rapidly replacing cathode-ray tubes in many facilities (52)(53)(54). The advantages of liquid-crystal displays include improved resolution, reduced weight, smaller form factor, reduced reflection, improved bit depth, and improved luminance range (55), although their disadvantages in terms of angular response and structured noise have not yet been fully addressed (56)(57)(58).…”

Section: Display Developmentsmentioning

confidence: 98%

Recent Advances in Chest Radiography

McAdams¹,

Samei²,

Dobbins³

et al. 2006

Radiology

184

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There have been many remarkable advances in conventional thoracic imaging over the past decade. Perhaps the most remarkable is the rapid conversion from film-based to digital radiographic systems. Computed radiography is now the preferred imaging modality for bedside chest imaging. Direct radiography is rapidly replacing film-based chest units for in-department posteroanterior and lateral examinations. An exciting aspect of the conversion to digital radiography is the ability to enhance the diagnostic capabilities and influence of chest radiography. Opportunities for direct computer-aided detection of various lesions may enhance the radiologist's accuracy and improve efficiency. Newer techniques such as dual-energy and temporal subtraction radiography show promise for improved detection of subtle and often obscured or overlooked lung lesions. Digital tomosynthesis is a particularly promising technique that allows reconstruction of multisection images from a short acquisition at very low patient dose. Preliminary data suggest that, compared with conventional radiography, tomosynthesis may also improve detection of subtle lung lesions. The ultimate influence of these new technologies will, of course, depend on the outcome of rigorous scientific validation.

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“…Instead, the injection method produced reasonably realistic sub-centimeter pulmonary nodules [12]. In contrast to digitally superimposed or externally applied nodules, the implantation method allows for imaging in two planes [26][27][28]. However, the present design of the phantom is not ideal for lateral projection images, since the flanges and screws would overlay the image.…”

mentioning

confidence: 93%

Pulmonary nodule detection with digital projection radiography: an ex-vivo study on increased latitude post-processing

et al. 2006

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To evaluate increased image latitude post-processing of digital projection radiograms for the detection of pulmonary nodules. 20 porcine lungs were inflated inside a chest phantom, prepared with 280 solid nodules of 4-8 mm in diameter and examined with direct radiography (3.0x2.5 k detector, 125 kVp, 4 mAs). Nodule position and size were documented by CT controls and dissection. Four intact lungs served as negative controls. Image post-processing included standard tone scales and increased latitude with detail contrast enhancement (log-factors 1.0, 1.5 and 2.0). 1280 sub-images (512x512 pixel) were centred on nodules or controls, behind the diaphragm and over free parenchyma, randomized and presented to six readers. Confidence in the decision was recorded with a scale of 0-100%. Sensitivity and specificity for nodules behind the diaphragm were 0.87/0.97 at standard tone scale and 0.92/0.92 with increased latitude (log factor 2.0). The fraction of "not diagnostic" readings was reduced (from 208/1920 to 52/1920). As an indicator of increased detection confidence, the median of the ratings behind the diaphragm approached 100 and 0, respectively, and the inter-quartile width decreased (controls: p<0.001, nodules: p=0.239) at higher image latitude. Above the diaphragm, accuracy and detection confidence remained unchanged. Here, the sensitivity for nodules was 0.94 with a specificity from 0.96 to 0.97 (all p>0.05). Increased latitude post-processing has minimal effects on the overall accuracy, but improves the detection confidence for sub-centimeter nodules in the posterior recesses of the lung.

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Comparison of liquid crystal versus cathode ray tube display for the detection of simulated chest lesions

Cited by 23 publications

References 13 publications

Detection of masses and microcalcifications of breast cancer on digital mammograms: comparison among hard-copy film, 3-megapixel liquid crystal display (LCD) monitors and 5-megapixel LCD monitors: an observer performance study

Detection of masses and microcalcifications of breast cancer on digital mammograms: comparison among hard-copy film, 3-megapixel liquid crystal display (LCD) monitors and 5-megapixel LCD monitors: an observer performance study

Recent Advances in Chest Radiography

Pulmonary nodule detection with digital projection radiography: an ex-vivo study on increased latitude post-processing

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