Lung lesions: correlation between viewing time and detection.


:The influence of viewing time on the detectability of subtle and obvious lung cancers was studied. Frontal chest radiographs of 40 patients with subtle cancers, 40 patients with obvious cancers, and 40 healthy control subjects were shown to four observers for four different viewing times (0.25 second, 1 second, 4 seconds, and unlimited time). Receiver operating characteristic analysis was used to compare the detectability of lesions. Performance was degraded as viewing time decreased. The true-positive fractions for subtle and obvious cancers were 30% and 70% at 0.25 second and 74% and 98% at unlimited viewing time, respectively, for a given false-positive fraction of 20%. Thus, even with unlimited viewing time, the false-negative fraction for subtle cancers was 26%. The difference in detectability between subtle and obvious lung cancers was exaggerated at 1.0 second compared with 4 seconds and unlimited viewing time. The following conclusions were reached: (a) a substantial proportion of subtle lung lesions are missed, even with unlimited viewing time; (b) a large proportion of obvious lung cancers are detected with flash viewing; (c) the detectability of lesions decreases considerably as viewing time becomes less than 4 seconds; and (d) differences in detectability are exaggerated by short viewing times.






Oestmann JW,Greene R,Kushner DC,Bourgouin PM,Linetsky L,Llewellyn HJ




Has Abstract


1988-02-01 00:00:00












  • NMR imaging of forearms in healthy volunteers and patients with giant-cell tumor of bone.

    abstract::Serial proton nuclear magnetic resonance (NMR) images of distal upper extremities were obtained in four healthy volunteers and four patients with giant cell tumor of the distal radius. The steady-state-free-precession (SSFP) data collection technique and an 8-cm bore superconducting magnet (1.44 tesla) were used. All ...


    pub_type: 杂志文章


    authors: Brady TJ,Gebhardt MC,Pykett IL,Buonanno FS,Newhouse JH,Burt CT,Smith RJ,Mankin HJ,Kistler JP,Goldman MR,Hinshaw WS,Pohost GM

    更新日期:1982-08-01 00:00:00

  • Cranial computed tomography in the baboon: normal anatomy.

    abstract::A simple, reliable, reproducible technique for performing CT scans on baboons is described. The normal morphologic appearance in 12 nonhuman primate (Papio cynocephalusl anubis) brains as defined by CT is correlated with the normal gross pathologic findings on postmortem examination. The orbital contents are also di...


    pub_type: 杂志文章


    authors: Drayer BP,Dujovny M,Wolfson SK Jr,Boehnke M,Cook EE,Barrionuevo PJ

    更新日期:1977-11-01 00:00:00

  • Patency of Wallstents placed across the venous anastomosis of hemodialysis grafts after percutaneous recanalization.

    abstract:PURPOSE:To determine the patency of Wallstents placed across the venous anastomosis of prosthetic bridge grafts after percutaneous graft recanalization. MATERIALS AND METHODS:Wallstents were placed across 26 lesions at the venous anastomosis of polytetrafluoroethylene (PTFE) grafts in 25 patients (11 men, 14 women; ag...


    pub_type: 杂志文章


    authors: Patel RI,Peck SH,Cooper SG,Epstein DM,Sofocleous CT,Schur I,Falk A

    更新日期:1998-11-01 00:00:00

  • Development of the human cerebellum observed with high-field-strength MR imaging.

    abstract::A retrospective study of 160 pediatric subjects, aged 32-410 weeks after conception, was conducted to determine the normal developmental patterns of the human cerebellum by means of magnetic resonance (MR) imaging. On the basis of axial T2-weighted spin-echo images (repetition time, 3,000 msec; echo time, 120 msec), w...


    pub_type: 杂志文章


    authors: Stricker T,Martin E,Boesch C

    更新日期:1990-11-01 00:00:00

  • Ureteric jet effect: the echographic appearance of urine entering the bladder. A means of identifying the bladder trigone and assessing ureteral function.

    abstract::In real-time ultrasound examinations of six women, jets of urine were noted to enter the bladder during the filling phase. The jets appeared at irregular intervals, and each jet lasted from a fraction of a second up to three seconds. The ureters functioned independently of each other. The flow characteristics of the u...


    pub_type: 杂志文章


    authors: Dubbins PA,Kurtz AB,Darby J,Goldberg BB

    更新日期:1981-08-01 00:00:00

  • Computed tomography of the parotid gland during contrast sialography.

    abstract::By performing CT scanning during contrast sialography, tumors within the parotid gland can be shown and their configuration in relation to the remaining normal salivary gland and surrounding structures can be appreciated. This permits better evaluation of the relationship of the tumor to the facial nerve, possible ext...


    pub_type: 杂志文章


    authors: Mancuso A,Rice D,Hanafee W

    更新日期:1979-07-01 00:00:00

  • Measurement of the velocity of ultrasound in human cortical bone in vivo. Estimation of its potential value in the diagnosis of osteoporosis and metabolic bone disease.

    abstract::Using a method combining the velocity of ultrasound and photon absorptiometry in the human radius in vivo, the authors measured the speed of sound in bone (U) and bone mineral content (BMC). From these measurements and a "simple" bone model, they then computed the bone mineral density, compact bone density, and modulu...


    pub_type: 杂志文章


    authors: Greenfield MA,Craven JD,Huddleston A,Kehrer ML,Wishko D,Stern R

    更新日期:1981-03-01 00:00:00

  • Dedicated breast CT: radiation dose and image quality evaluation.

    abstract:PURPOSE:To evaluate the feasibility of breast computed tomography (CT) in terms of radiation dose and image quality. MATERIALS AND METHODS:Validated Monte Carlo simulation techniques were used to estimate the average glandular dose (AGD). The calculated photon fluence at the detector for high-quality abdominal CT (120...


    pub_type: 杂志文章


    authors: Boone JM,Nelson TR,Lindfors KK,Seibert JA

    更新日期:2001-12-01 00:00:00

  • Two-phase helical CT for pancreatic tumors: pancreatic versus hepatic phase enhancement of tumor, pancreas, and vascular structures.

    abstract:PURPOSE:To quantitatively evaluate and validate a two-phase helical computed tomographic (CT) protocol for evaluation of pancreatic tumors. MATERIALS AND METHODS:Twenty-seven patients with pathologically proved pancreatic adenocarcinomas prospectively underwent two-phase CT examination with helical acquisition during ...


    pub_type: 杂志文章


    authors: Lu DS,Vedantham S,Krasny RM,Kadell B,Berger WL,Reber HA

    更新日期:1996-06-01 00:00:00

  • A private breast imaging practice: medical audit of 25,788 screening and 1,077 diagnostic examinations.

    abstract::During 1989 and 1990, 25,788 screening and 1,077 diagnostic breast imaging examinations were performed. Audit was performed in 6-month intervals to allow comparison of performance over time. Sensitivity, positive predictive value, and stage of disease were determined for each radiologist, for patients over and those u...


    pub_type: 杂志文章


    authors: Robertson CL

    更新日期:1993-04-01 00:00:00

  • Intraarticular facet block: diagnostic test or therapeutic procedure?

    abstract::The specificity of the intraarticular facet block as a diagnostic test for facet joint disease is currently unknown. Capsular rupture with epidural and periarticular diffusion is probably responsible for many false positive findings. We found a comparatively low success rate of the procedure in 25 patients in whom max...


    pub_type: 杂志文章


    authors: Raymond J,Dumas JM

    更新日期:1984-05-01 00:00:00

  • Female Human Spines with Simulated Osteolytic Defects: CT-based Structural Analysis of Vertebral Body Strength.

    abstract::Purpose To evaluate a CT structural analysis protocol (SAP) for estimating the strength of human female cadaveric spines with lytic lesions. Materials and Methods Osteolytic foci was created in the middle vertebra of 44 thoracic and lumbar three-level segments from 11 female cadavers (age range, 50-70 years). The segm...


    pub_type: 杂志文章


    authors: Alkalay R,Adamson R,Miropolsky A,Hackney D

    更新日期:2018-08-01 00:00:00

  • Multiphase CT Angiography Improves Prediction of Intracerebral Hemorrhage Expansion.

    abstract::Purpose To determine the prevalence of the spot sign and the accuracy of using the spot sign to predict intracerebral hemorrhage (ICH) expansion with standardized multiphase computed tomographic (CT) angiography. Materials and Methods This prospective observational cohort study included 123 consecutive patients with a...


    pub_type: 杂志文章


    authors: Rodriguez-Luna D,Coscojuela P,Rodriguez-Villatoro N,Juega JM,Boned S,Muchada M,Pagola J,Rubiera M,Ribo M,Tomasello A,Demchuk AM,Goyal M,Molina CA

    更新日期:2017-12-01 00:00:00

  • DSA versus multi-detector row CT angiography in peripheral arterial disease: randomized controlled trial.

    abstract:PURPOSE:To prospectively compare therapeutic confidence in, patient outcomes (in terms of quality of life) after, and the costs of digital subtraction angiography (DSA) with those of multi-detector row computed tomographic (CT) angiography as the initial diagnostic imaging test in patients with peripheral arterial dise...


    pub_type: 临床试验,杂志文章,随机对照试验


    authors: Kock MC,Adriaensen ME,Pattynama PM,van Sambeek MR,van Urk H,Stijnen T,Hunink MG

    更新日期:2005-11-01 00:00:00

  • Uterine artery embolization: optimization with preprocedural prediction of the best tube angle obliquity by using 3D-reconstructed contrast-enhanced MR angiography.

    abstract:PURPOSE:To evaluate the effect of preprocedural prediction of the best tube angle obliquity for visualization of the uterine artery origin by using three-dimensional (3D)-reconstructed contrast material-enhanced magnetic resonance (MR) angiography on the radiation dose, fluoroscopy time, and contrast medium volume duri...


    pub_type: 杂志文章


    authors: Naguib NN,Nour-Eldin NE,Lehnert T,Hammerstingl RM,Korkusuz H,Eichler K,Zangos S,Vogl TJ

    更新日期:2009-06-01 00:00:00

  • Chronic portosystemic encephalopathy: embolization of portosystemic shunts.

    abstract::Operative ligation of portosystemic shunts is effective in controlling chronic portosystemic encephalopathy (CPSE) but is associated with significant mortality. Review of the records of five patients with CPSE treated with radiologic occlusion procedures showed that these are suitable alternatives to surgery. Three pa...


    pub_type: 杂志文章


    authors: Uflacker R,Silva Ade O,d'Albuquerque LA,Piske RL,Mourão GS

    更新日期:1987-12-01 00:00:00

  • Relevance of spinal cord abnormalities to clinical disability in multiple sclerosis: MR imaging findings in a large cohort of patients.

    abstract:PURPOSE:To determine whether spinal cord atrophy differs among disease subtypes in multiple sclerosis (MS) and whether it offers diagnostic and clinical correlative information beyond that provided by other magnetic resonance (MR) imaging markers. MATERIALS AND METHODS:The institutional review board approved the study...


    pub_type: 杂志文章


    authors: Lukas C,Sombekke MH,Bellenberg B,Hahn HK,Popescu V,Bendfeldt K,Radue EW,Gass A,Borgwardt SJ,Kappos L,Naegelin Y,Knol DL,Polman CH,Geurts JJ,Barkhof F,Vrenken H

    更新日期:2013-11-01 00:00:00

  • CSF rhinorrhea: detection and localization using overpressure cisternography with Tc-99m-DTPA.

    abstract::We performed 32 overpressure radionuclide cisternography (ORNC) studies to examine 26 patients who were clinically suspected of having cerebrospinal fluid (CSF) fistula with rhinorrhea. Fifteen (47%) of these cisternography studies were positive, and the site of the leak was identified. No leak could be demonstrated i...


    pub_type: 杂志文章


    authors: Curnes JT,Vincent LM,Kowalsky RJ,McCartney WH,Staab EV

    更新日期:1985-03-01 00:00:00

  • Pyarthrosis complicating rheumatoid arthritis. Roentgenographic evaluation of 5 patients and review of the literature.

    abstract::Five patients with pyarthrosis complicating rheumatoid arthritis are described. Only minimal clinical signs may be seen in such patients, making accurate diagnosis of this occasional complication difficult. Roentgenographic abnormalities include a rapidly enlarging joint effusion and progressive cartilage and bone des...


    pub_type: 杂志文章


    authors: Resnick D

    更新日期:1975-03-01 00:00:00

  • Effect of Change in Portal Venous Blood Flow Rates on the Performance of a 2.45-GHz Microwave Ablation Device.

    abstract:PURPOSE:To investigate the effect of change in portal venous blood flow rates on the size and shape of ablations created by a 2.45-GHz microwave ablation device. MATERIALS AND METHODS:This study was exempt from review by the institutional animal care and use committee. An in vitro bovine liver model perfused with auto...


    pub_type: 杂志文章


    authors: Dodd GD 3rd,Kreidler SM,Lanctot AC,Glueck DH

    更新日期:2015-12-01 00:00:00

  • Acute rat lung injury: feasibility of assessment with micro-CT.

    abstract:PURPOSE:To evaluate the feasibility of micro-computed tomography (CT) for analysis of the lung fine structure and its alterations during endotoxin-induced lung injury. MATERIALS AND METHODS:Intravital perfusion-fixed rat lungs with (n = 5) and without (n = 5) endotoxin perfusion were scanned with micro-CT. Three imagi...


    pub_type: 杂志文章


    authors: Langheinrich AC,Leithäuser B,Greschus S,Von Gerlach S,Breithecker A,Matthias FR,Rau WS,Bohle RM

    更新日期:2004-10-01 00:00:00

  • Gallbladder disease: appearance of associated transient increased attenuation in the liver at biphasic, contrast-enhanced dynamic CT.

    abstract:PURPOSE:To evaluate the frequency, location, and appearance of transient increased attenuation in the liver during arterial-phase helical or incremental computed tomography (CT) in patients with gallbladder disease without hepatic extension. MATERIALS AND METHODS:Findings in dynamic CT examinations in 31 patients with...


    pub_type: 杂志文章


    authors: Ito K,Awaya H,Mitchell DG,Honjo K,Fujita T,Uchisako H,Moritani K,Nomura S,Higuchi M,Kada T,Matsumoto T,Matsunaga N

    更新日期:1997-09-01 00:00:00

  • Adenocarcinoma of the esophagus: relationship to Barrett mucosa.

    abstract::Primary adenocarcinoma of the esophagus is thought to be a rare lesion. However, pathologic records at our institution from 1979 to 1982 show that adenocarcinoma accounted for 17 of 89 (19%) of all primary malignant tumors in the esophagus. All 17 cases arose in Barrett mucosa. In eight cases, there was surgically pro...


    pub_type: 杂志文章


    authors: Levine MS,Caroline D,Thompson JJ,Kressel HY,Laufer I,Herlinger H

    更新日期:1984-02-01 00:00:00

  • Screening behavior of women after a false-positive mammogram.

    abstract:PURPOSE:To determine the effect of a false-positive mammogram that leads to open surgical biopsy on subsequent screening mammography behavior in women. MATERIALS AND METHODS:This study was performed with a retrospective cohort design, and data were collected by means of telephone interview. All participants were women...


    pub_type: 杂志文章


    authors: Pisano ED,Earp J,Schell M,Vokaty K,Denham A

    更新日期:1998-07-01 00:00:00

  • Acrosclerosis in Sarcoidosis.

    abstract::Areas of sclerosis in the phalanges, particularly the terminal phalanges, are common in sarcoidosis despite the rarity of osteosclerotic changes in other bones. Of 37 patients with sarcoidosis with osseous changes of the hands or feet, 20 (54%) has sclerosis either alone or in combination with bone destruction. Of 48 ...


    pub_type: 杂志文章


    authors: McBrine CS,Fisher MS

    更新日期:1975-05-01 00:00:00

  • Vertebral-body collapse in focal and diffuse disease: patterns of pathologic processes.

    abstract::The radiographic patterns of vertebral-body collapse and/or endplate deformity were examined in 99 autopsy specimens of the thoracolumbar spine with benign and malignant disease. Angling of endplates was found to be highly predictive of underlying malignancy, whereas concavity was more suggestive of benign disease, fo...


    pub_type: 杂志文章


    authors: Sartoris DJ,Clopton P,Nemcek A,Dowd C,Resnick D

    更新日期:1986-08-01 00:00:00

  • Nonendoscopic gastric mucosal biopsy to augment double-contrast upper gastrointestinal barium examination.

    abstract::The authors present a gastric mucosal biopsy technique with use of a nasogastric catheter and biopsy forceps after double-contrast upper gastrointestinal fluoroscopy in patients with clinical symptoms of dyspepsia. In 51 patients (18 men and 33 women, aged 27-73 years [mean, 46 years]), 136 aggregates (specimens compo...


    pub_type: 杂志文章


    authors: Bender GN,Myers MA,Reichle JL,Tsuchida A,Peller T,Jackson F,Malcolm B

    更新日期:1994-04-01 00:00:00

  • Ultrasonic evaluation of intracranial pathology in infants: a new technique.

    abstract::A prospective study had demonstrated the clinical usefulness of water-delay ultrasound as a means of routinely imaging the intracranial contents in infants younger than one year of age. Correlation between ultrasound and CT images was excellent, showing both normal and pathological anatomy. This technique is most help...


    pub_type: 杂志文章


    authors: Haber K,Wachter RD,Christenson PC,Vaucher Y,Sahn DJ,Smith JR

    更新日期:1980-01-01 00:00:00

  • Gliomas: classification with MR imaging.

    abstract::The findings at magnetic resonance (MR) imaging in a group of 36 pathologically verified supratentorial gliomas were analyzed and compared with the biopsy diagnoses (a) to determine whether MR imaging could be used to classify astrocytic-series tumors into a three-tiered system of low-grade astrocytoma, anaplastic ast...


    pub_type: 杂志文章


    authors: Dean BL,Drayer BP,Bird CR,Flom RA,Hodak JA,Coons SW,Carey RG

    更新日期:1990-02-01 00:00:00

  • Recurrent symptoms after shoulder instability repair: direct MR arthrographic assessment--correlation with second-look surgical evaluation.

    abstract:PURPOSE:To retrospectively determine the accuracy of direct magnetic resonance (MR) arthrography of the shoulder in patients with recurrent or residual signs and/or symptoms of instability after prior instability repair, with surgical findings as the reference standard. MATERIALS AND METHODS:After institutional ethics...


    pub_type: 杂志文章


    authors: Probyn LJ,White LM,Salonen DC,Tomlinson G,Boynton EL

    更新日期:2007-12-01 00:00:00