Abstract:
PURPOSE:To prospectively investigate the relative accuracy and reproducibility of manual and automated computer software measurements by using polyps of known size in a human colectomy specimen.
MATERIALS AND METHODS:Institutional review board approval was obtained for the study; written consent for use of the surgical specimen was obtained. A colectomy specimen containing 27 polyps from a 16-year-old male patient with familial adenomatous polyposis was insufflated, submerged in a container with solution, and scanned at four-section multi-detector row computed tomography (CT). A histopathologist measured the maximum dimension of all polyps in the opened specimen. Digital photographs and line drawings were produced to aid CT-histologic measurement correlation. A novice (radiographic technician) and an experienced (radiologist) observer independently estimated polyp diameter with three methods: manual two-dimensional (2D) and manual three-dimensional (3D) measurement with software calipers and automated measurement with software (automatic). Data were analyzed with paired t tests and Bland-Altman limits of agreement.
RESULTS:Seven polyps ( journal_name journal_title authors doi subject pub_date pages issue eissn issn pii journal_volume pub_type
相关文献
RADIOLOGY文献大全abstract:PURPOSE:To determine the clinical feasibility of a contrast material--enhanced two-dimensional (2D) magnetic resonance (MR) angiographic sequence in lower extremity arteries. MATERIALS AND METHODS:Four healthy volunteers and 12 patients underwent dynamic contrast-enhanced MR angiography; all patients also underwent co...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.196.3.7644630
更新日期:1995-09-01 00:00:00
abstract::Quality control in diagnostic radiography begins with production of predictable exposures. The authors describe a technique which permits determination of the variation of mR/mAs for the entire diagnostic range of times and currents in only about 1 hour. The mR/mAs in newly installed units has been shown to vary by as...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/122.2.489
更新日期:1977-02-01 00:00:00
abstract::Functional magnetic resonance (MR) imaging of the kidneys has gained interest recently, especially in the detection of early changes in acute kidney injury or to predict progression of chronic kidney disease (CKD). The application of these methods to cardiorenal syndrome (CRS) is novel. CRS is widely accepted as a com...
journal_title:Radiology
pub_type: 评论,杂志文章
doi:10.1148/radiol.2017171957
更新日期:2018-01-01 00:00:00
abstract:PURPOSE:To determine if a symptomatic accessory navicular bone, a normal variant, displays a pattern of altered signal intensity on magnetic resonance (MR) images indicative of an abnormality that could account for the patient's foot pain. MATERIALS AND METHODS:Both feet were imaged in seven patients with an accessory...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.195.3.7754020
更新日期:1995-06-01 00:00:00
abstract::The quality of chest images obtained with portable radiography was evaluated for a conventional screen-film system, a new asymmetric screen-film chest system, and computed radiography (CR). Sixty chest images were obtained in 20 patients in an intensive care unit. The CR system was ranked by all three evaluating radio...
journal_title:Radiology
pub_type: 评论,杂志文章
doi:10.1148/radiology.186.2.8421740
更新日期:1993-02-01 00:00:00
abstract::With echo-planar magnetic resonance (MR) imaging, the authors measured the intrinsic pulsatile motion of brain parenchyma. Phase-sensitive, electrocardiography-gated, two-dimensional cine images were acquired throughout the cardiac cycle by using a spin-echo, blipped echo-planar MR pulse sequence. Transverse and coron...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.185.3.1438740
更新日期:1992-12-01 00:00:00
abstract::To assess the capability of magnetic resonance (MR) imaging to demonstrate postirradiation changes in the uterus, MR studies of 23 patients who had undergone radiation therapy were retrospectively examined and compared with those of 30 patients who had not undergone radiation therapy. MR findings were correlated with ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.170.1.2909120
更新日期:1989-01-01 00:00:00
abstract::In a study group of 18 consecutive patients with Ewing sarcoma proved by means of biopsy, the signal intensity characteristics of tumor on magnetic resonance (MR) images were assessed before and after chemotherapy. Sixteen patients underwent MR imaging at 1.5 T before chemotherapy; all 18 patients underwent MR imaging...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.184.3.1509080
更新日期:1992-09-01 00:00:00
abstract::Sports medicine is one of the most rapidly growing subspecialties in orthopedics. Magnetic resonance (MR) imaging in sports medicine includes depiction of normal anatomy and pathologic conditions in almost every joint in the body, but the MR examinations most frequently requested are of the knee and shoulder. The repo...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2243012180
更新日期:2002-09-01 00:00:00
abstract::Twenty-two normal volunteers and 32 patients with either benign prostatic hypertrophy or prostatic carcinoma were examined by magnetic resonance imaging (MRI). The images were of high quality and clearly demonstrated the prostate gland and the surrounding anatomy but were of limited value in differentiating between be...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.154.1.2578070
更新日期:1985-01-01 00:00:00
abstract:PURPOSE:To compare percutaneous self-expanding metal stents with conventional endoscopic polyethylene endoprostheses for treatment of malignant biliary obstruction by means of a prospective randomized clinical trial. MATERIALS AND METHODS:Patients with biliary obstruction due to inoperable primary carcinoma of the pan...
journal_title:Radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1148/radiol.2243011517
更新日期:2002-10-01 00:00:00
abstract:PURPOSE:To compare diagnostic performance and time efficiency of double-reading first-reader computer-aided detection (CAD) (DR FR CAD) followed by radiologist interpretation with that of an unassisted read using segmentally unblinded colonoscopy as reference standard. MATERIALS AND METHODS:The local ethical committee...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.13121192
更新日期:2013-09-01 00:00:00
abstract::Paraffin block radiography has been shown to be useful in helping identify lesions in biopsy specimens of breast tissue. Use of an orthogonal view enables determination of the approximate depth of a lesion within a paraffin block. This simple technique further guarantees histologic evaluation of the area of radiograph...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.180.3.1871310
更新日期:1991-09-01 00:00:00
abstract::Abnormalities at cerebral proton spectroscopy occur in patients with the acquired immunodeficiency syndrome (AIDS). N-acetyl aspartate (NAA) is believed to be a neuronal marker, and neuronal loss is thought to underlie the human immunodeficiency virus (HIV)-associated cognitive/motor complex. The proton spectra in 103...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.188.1.8099750
更新日期:1993-07-01 00:00:00
abstract::Sensitivity and specificity of first screen mammography in a randomized screening trial at five centers are reported. A total of 23,101 women underwent mammography; in 139, breast cancer was detected at first screening; in 20, less than 12 months after first screening; and in 47, at second screening. All 206 cancer ca...
journal_title:Radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1148/radiology.160.2.3523590
更新日期:1986-08-01 00:00:00
abstract::A new type of endovascular prosthesis was inserted in 28 animals and evaluated for several factors, including thrombogenicity, tendency to migrate, critical implant zones, and incorporation into the vascular wall. The new prosthesis is a woven, multifilament structure of stainless steel alloy; its inherent elastic, se...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.164.3.3303120
更新日期:1987-09-01 00:00:00
abstract::The ingestion of small, flat disc batteries by infants and children may be life threatening if the battery leaks or disintegrates resulting in perforation of the gastrointestinal tract. The fluoroscopic removal of six ingested batteries from the stomach using an orogastric tube and magnet and a Foley catheter is descr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.150.2.6691120
更新日期:1984-02-01 00:00:00
abstract::The authors present 3 cases of surgically proved Klatskin tumor diagnosed by ultrasound alone. Sonographic features of these tumors include (a) dilatation of the intrahepatic biliary ducts but not the extrahepatic duct, (b) non-union of the right and left hepatic ducts, and (c) small, solid masses at the hepatic hilus...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.148.3.6308710
更新日期:1983-09-01 00:00:00
abstract::Major socioeconomic changes in the practice of medicine in the past 2 decades have had a great impact on diagnostic radiology and have encouraged other physicians and entrepreneurs to enter many areas of this specialty. Major alterations in the practice of diagnostic radiology will be required if the specialty is to s...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/172.3.889
更新日期:1989-09-01 00:00:00
abstract:PURPOSE:To determine the effect of magnetic resonance (MR) imaging findings on management of complex fetal disorders. MATERIALS AND METHODS:MR imaging of the fetus was performed in 25 consecutive pregnant patients referred because of possible complex fetal disorders suspected on the basis of ultrasonographic (US) find...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.213.3.r99dc39691
更新日期:1999-12-01 00:00:00
abstract::A stereotaxic frame, compatible with digital subtraction angiography, computed tomography, and magnetic resonance imaging, is described along with a set of software programs that run in an independent imaging computer system, as well as in the computers associated with each modality. Plexiglas plates fastened to the s...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.161.3.3538140
更新日期:1986-12-01 00:00:00
abstract::BackgroundThe performance of a deep learning (DL) algorithm should be validated in actual clinical situations, before its clinical implementation.PurposeTo evaluate the performance of a DL algorithm for identifying chest radiographs with clinically relevant abnormalities in the emergency department (ED) setting.Materi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2019191225
更新日期:2019-12-01 00:00:00
abstract:PURPOSE:To determine if percutaneously applied radio frequency (RF) combined with percutaneous ethanol instillation (PEI) can increase the extent of ablation in rat breast tumors. MATERIALS AND METHODS:R3230 mammary adenocarcinoma was implanted bilaterally in the mammary fat pads of 18 female rats. The tumor nodules m...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.217.3.r00dc27827
更新日期:2000-12-01 00:00:00
abstract::Purpose To evaluate whether dual-selectin-targeted US molecular imaging allows longitudinal monitoring of anti-inflammatory treatment effects in an acute terminal ileitis model in swine. Materials and Methods The Institutional Animal Care and Use Committee approved all animal studies. Fourteen swine with chemically in...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2018172600
更新日期:2018-10-01 00:00:00
abstract::Two cases of adenoid cystic carcinoma of the trachea, and a review of the literature, are presented. This unusual and often undiagnosed tumor closely mimics asthma and chronic bronchitis. Although many patients die within 2 to 3 years of the onset of symptoms without appropriate treatment, adequate therapy should lead...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/122.3.597
更新日期:1977-03-01 00:00:00
abstract:PURPOSE:To (a) demonstrate an image-processing method that can automatically measure the power Doppler signal in a three-dimensional ( 3D three-dimensional ) ultrasonographic (US) volume by using the location of organs within the image and (b) compare 3D three-dimensional fractional moving blood volume ( FMBV fractiona...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14132363
更新日期:2015-01-01 00:00:00
abstract:PURPOSE:To evaluate the effect of scanner type and calcium measure on the reproducibility of calcium measurements. MATERIALS AND METHODS:This investigation was approved by the institutional review boards of each study site and by the Institutional Review Board of the Los Angeles Biomedical Research Institute. Informed...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2362040513
更新日期:2005-08-01 00:00:00
abstract::The relation of liver fat content to CT number was studied in 20 rabbits (17 experimental, 3 control), where fatty degeneration was produced by carbon tetrachloride (CCl4) ingestion. Liver scanning was performed before and 2--5 days after CCl4 administration.. Changes (decrease) in CT number were compared with triglyc...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/130.2.511
更新日期:1979-02-01 00:00:00
abstract::Thirty-two patients with a known primary malignancy and a symptomatic malignant pleural effusion underwent small-bore-catheter thoracostomy and talc pleurodesis. Twenty-three patients (72%) had a complete response; four (12%), a partial response; and five (16%), no response. Symptoms in all those who responded were cl...
journal_title:Radiology
pub_type: 临床试验,杂志文章
doi:10.1148/radiology.210.1.r99dc04277
更新日期:1999-01-01 00:00:00
abstract::Fifty consecutive patients with suspected herniated nucleus pulposus at L4-5 or L5-S1 were evaluated prospectively with both epidural venography and iophendylate myelography. The two procedures were compared with respect to diagnostic accuracy, ease of performance, and complications. Evaluation of both the L4-5 and L5...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.1.7350590
更新日期:1980-01-01 00:00:00