Postnatal development of the central skull base: normal variants.


PURPOSE:To illustrate the normal variants and developmental anomalies of the skull base on computed tomographic (CT) scans. MATERIALS AND METHODS:One hundred eighty-nine children (age range, newborn to 18 years; median age, 4.0 years) without skull base deformity were referred for cranial CT. Normal developmental variants in the sphenoid and occipital bones were characterized. RESULTS:Sixteen normal variants of central skull base development were identified including anterior foramen in the presphenoid, remnant of the craniopharyngeal canal in the anterior portion of the postsphenoid, rounded defects in the central sphenoid, clefts and fissures along the basiocciput and basisphenoid, basioticum variants, notochordal remnant in the midline of the basiocciput, and fusion variants of the Kerckring ossicle with the supraoccipital portion of the occipital bone. CONCLUSION:The location and CT appearance of the 16 variants and anomalies are related to the known embryologic origin of this region. Recognition of such variants may prove necessary in evaluation of patients with skeletal dysplasias and disorders of skull base development.






Madeline LA,Elster AD




Has Abstract


1995-09-01 00:00:00












  • Adaptive technique for three-dimensional MR imaging of moving structures.

    abstract::The authors describe an adaptive motion correction method for three-dimensional magnetic resonance (MR) imaging. Three-dimensional imaging offers many advantages over two-dimensional multisection imaging but is susceptible to image corruption due to motion. Thus, it has been of limited use in the imaging of mobile str...


    pub_type: 杂志文章


    authors: Korin HW,Felmlee JP,Ehman RL,Riederer SJ

    更新日期:1990-10-01 00:00:00

  • Aortic and hepatic enhancement and tumor-to-liver contrast: analysis of the effect of different concentrations of contrast material at multi-detector row helical CT.

    abstract:PURPOSE:To investigate the effect of different iodine concentrations of contrast material on aortic and hepatic enhancement and the detectability of hypervascular hepatocellular carcinoma (HCC) with multi-detector row computed tomography (CT) and a uniphasic contrast material injection technique. MATERIALS AND METHODS...


    pub_type: 临床试验,杂志文章,随机对照试验


    authors: Awai K,Takada K,Onishi H,Hori S

    更新日期:2002-09-01 00:00:00

  • Percutaneous endoscopic cholecystolithotripsy. Work in progress.

    abstract::In spite of long-term adjunctive oral dissolution therapy, residual gallstones have been reported in up to 50% of gallstone patients 3 months after extracorporeal shock-wave lithotripsy. Six women and five men, aged 31-75 years, underwent percutaneous endoscopic cholecystolithotripsy between April 1988 and October 198...


    pub_type: 杂志文章


    authors: Hruby W,Stackl W,Urban M,Armbruster C,Marberger M

    更新日期:1989-11-01 00:00:00

  • Contrast agents lower ventricular fibrillation threshold.

    abstract::Ventricular fibrillation thresholds were measured in anesthetized, closed-chest dogs during the injection of Renografin 76 or Conray 400 into the left coronary artery. Both agents significantly lowered fibrillation threshold--Renografin to 58 +/- 7%; Conray to 20 +/- 5% of control, respectively. The experimental metho...


    pub_type: 杂志文章


    authors: Wolf GL,Kraft L,Kilzer K

    更新日期:1978-10-01 00:00:00

  • Simultaneously acquired MR/PET images compared with sequential MR/PET and PET/CT: alignment quality.

    abstract:PURPOSE:To compare anatomic alignment between morphologic and positron emission tomography (PET) images acquired in the abdomen and pelvis by using simultaneous magnetic resonance (MR)/PET, PET/computed tomography (CT), and retrospective MR/PET fusion and to compare alignment between MR and PET in simultaneous and sequ...


    pub_type: 杂志文章


    authors: Brendle CB,Schmidt H,Fleischer S,Braeuning UH,Pfannenberg CA,Schwenzer NF

    更新日期:2013-07-01 00:00:00

  • Clinically isolated syndrome suggestive of multiple sclerosis: voxelwise regional investigation of white and gray matter.

    abstract:PURPOSE:To quantify white matter (WM) and gray matter (GM) damage in patients who presented with clinically isolated syndrome (CIS), which is suggestive of multiple sclerosis (MS), by combining volume-based morphometry (VBM) and tract-based spatial statistics (TBSS). MATERIALS AND METHODS:This prospective HIPAA-compli...


    pub_type: 杂志文章


    authors: Raz E,Cercignani M,Sbardella E,Totaro P,Pozzilli C,Bozzali M,Pantano P

    更新日期:2010-01-01 00:00:00

  • Multiple myeloma: MR patterns of response to treatment.

    abstract:PURPOSE:To assess changes in the magnetic resonance (MR) appearance of the spine in patients with multiple myeloma who responded to chemotherapy. MATERIALS AND METHODS:Twenty patients with multiple myeloma underwent MR imaging of the spine before and after chemotherapy. Sagittal T1-weighted images were obtained before...


    pub_type: 杂志文章


    authors: Moulopoulos LA,Dimopoulos MA,Alexanian R,Leeds NE,Libshitz HI

    更新日期:1994-11-01 00:00:00

  • Gallbladder carcinoma: evaluation with MR imaging.

    abstract::Magnetic resonance (MR) images of 19 patients with histologically proved gallbladder carcinoma were retrospectively reviewed to determine the appearance of the primary tumor, and to assess the ability of MR imaging to demonstrate the various modes of tumor spread beyond the gallbladder. The primary tumor, as well as t...


    pub_type: 杂志文章


    authors: Sagoh T,Itoh K,Togashi K,Shibata T,Minami S,Noma S,Yamashita K,Nishimura K,Asato R,Mori K

    更新日期:1990-01-01 00:00:00

  • Liver metastases discovered during high-dose excretory urography.

    abstract::Liver metastases were discovered in 4 adults during high-dose excretory urography with upper abdominal tomograms. Previous reports in the English literature have noted incidental discovery of hepatic cysts or abscesses during urography, but no documented cases of liver metastases were found. All metastases were visual...


    pub_type: 杂志文章


    authors: Brennan R,Cossrow J,Pollack H

    更新日期:1978-05-01 00:00:00

  • Method for measuring three-dimensional motion with tagged MR imaging.

    abstract::Recent methods of magnetic resonance imaging involve the placement of a grid of planes of saturation over the imaging plane; distortion of the grid corresponds to tissue displacement in two dimensions. An extension to this method that allows measurement of motion in the third dimension involves a second acquisition th...


    pub_type: 杂志文章


    authors: Pipe JG,Boes JL,Chenevert TL

    更新日期:1991-11-01 00:00:00

  • Empyema as a complication of retropharyngeal and neck abscesses in children.

    abstract::Empyema developing from retropharyngeal abscess is a rare complication. Two infants with clinical symptomatology and inital chest radiographic findings of pleural fluid which suggested the possibility of retrophoryngeal abscess are described. A child with submandibular and cervical abscesses is also reported; pleural ...


    pub_type: 杂志文章


    authors: Ramilo J,Harris VJ,White H

    更新日期:1978-03-01 00:00:00

  • Pulmonary retention and translocation of insufflated tantalum.

    abstract::Studies of pylmonary clearance of tantalum dust labeled with 182Ta in dogs have been extended to as far as 816 days postexposure in order to substantiate earlier pulmonary retention data, examine lymphatic uptake, and seek long-term pathological changes. Exposure to 5-mug and 10-mug powders was compared with the resul...


    pub_type: 杂志文章


    authors: Morrow PE,Kilpper RW,Beiter HE,Gibb FR

    更新日期:1976-11-01 00:00:00

  • Recurrent renovascular hypertension. Report of an unusual case.

    abstract::A 7-year-old girl with histologically proved fibromuscular dysplasia underwent renal autotransplantation with prompt return of the blood pressure to normal. Two months later, immediately after tonsillectomy, severe hypertension recurred with marked narrowing of the previously patent anastomosis. After 4 weeks on antih...


    pub_type: 杂志文章


    authors: Gyepes MT,Kaufman JJ,Dornfeld L

    更新日期:1976-07-01 00:00:00

  • Osteopetrosis: MR characteristics at 1.5 T.

    abstract::Four patients with proved osteopetrosis (three with the infantile malignant form and one with the benign form) were examined with magnetic resonance imaging at 1.5 T. All patients were studied in the coronal and sagittal planes using both short and long repetition time/echo time sequences. The infantile malignant form...


    pub_type: 杂志文章


    authors: Rao VM,Dalinka MK,Mitchell DG,Spritzer CE,Kaplan F,August CS,Axel L,Kressel HY

    更新日期:1986-10-01 00:00:00

  • Ultrasonic appearance of mammary carcinoma with a dedicated whole-breast scanner.

    abstract::Forty-four pathologically proved mammary carcinomas were studied by clinical examination, xeroradiography, and ultrasonography with a dedicated whole-breast scanner. Abnormalities reflecting carcinoma were shown by echography in 90% of cases and xeromammography in 97%. Ultrasonic manifestations of malignancy were sepa...


    pub_type: 杂志文章


    authors: Maturo VG,Zusmer NR,Gilson AJ,Bear B

    更新日期:1982-03-01 00:00:00

  • Renal arteries: optimization of three-dimensional gadolinium-enhanced MR angiography with bolus-timing-independent fast multiphase acquisition in a single breath hold.

    abstract:PURPOSE:To compare two different three-dimensional (3D) gadolinium-enhanced magnetic resonance (MR) angiographic techniques. MATERIALS AND METHODS:In 26 patients suspected of having renal artery stenosis, results with fast multiphase 3D MR angiography were compared to those with standard 3D MR angiography in 37 patien...


    pub_type: 杂志文章


    authors: Schoenberg SO,Bock M,Knopp MV,Essig M,Laub G,Hawighorst H,Zuna I,Kallinowski F,van Kaick G

    更新日期:1999-06-01 00:00:00

  • Buckled meniscus.

    abstract::Normal menisci may show transient distortion during knee arthrography. This usually results from intermittent visualization of the meniscus out of direct profile to the x-ray beam. Similar transient distortion may result from actual buckling of an anatomically normal meniscus during stressful maneuvers in young indivi...


    pub_type: 杂志文章


    authors: Hall FM

    更新日期:1978-01-01 00:00:00

  • Adnexal masses: transvaginal US and gadolinium-enhanced MR imaging assessment of intratumoral structure.

    abstract:PURPOSE:To evaluate the accuracy of transvaginal ultrasound (US) and gadolinium-enhanced magnetic resonance (MR) imaging in the assessment of the intratumoral structure of an adnexal mass. MATERIALS AND METHODS:The population comprised 82 patients with an adnexal mass who underwent both transvaginal US and gadolinium-...


    pub_type: 杂志文章


    authors: Komatsu T,Konishi I,Mandai M,Togashi K,Kawakami S,Konishi J,Mori T

    更新日期:1996-01-01 00:00:00

  • Ferromagnetic materials in patients: detection before MR imaging.

    abstract::A number of surgical clips and other metallic materials embedded within patients have ferromagnetic properties that present a potential hazard when in the strong fields associated with magnetic resonance imaging. Several types of magnetometers and metal detectors were investigated as possible pre-imaging screening dev...


    pub_type: 杂志文章


    authors: Finn EJ,Di Chiro G,Brooks RA,Sato S

    更新日期:1985-07-01 00:00:00

  • Exercise radionuclide ventriculography: practical considerations and sensitivity of coronary artery disease detection.

    abstract::Eighty-nine patients were evaluated for coronary artery disease (CAD) with exercise radionuclide ventriculography (ERV) and contrast coronary angiography. In 70 patients with documented lesions the ERV was abnormal in 65 for a sensitivity of 93%. In patients with normal coronary arteries, the ERV was abnormal in none ...


    pub_type: 杂志文章


    authors: Brady TJ,Thrall JH,Clare JM,Rogers WL,Lo K,Pitt B

    更新日期:1979-09-01 00:00:00

  • Colonic strictures in infants following intestinal ischemia. Treatment by balloon catheter dilatation.

    abstract::Successful balloon catheter dilatation through the defunctionalized limb of a colostomy was performed in three infants with postischemic colonic stricture. This experience suggests that balloon catheter dilatation can be an alternative to surgical resection in treating delayed ischemic colonic stricture. ...


    pub_type: 杂志文章


    authors: Ball WS Jr,Seigel RS,Goldthorn JF,Kosloske AM

    更新日期:1983-11-01 00:00:00

  • Liver adenomatosis: clinical, histopathologic, and imaging findings in 15 patients.

    abstract:PURPOSE:To report and correlate the clinical, histopathologic, and imaging findings in 15 patients with liver adenomatosis. MATERIALS AND METHODS:Fifteen adult patients had more than 10 hepatic adenomas each and no history of glycogen storage disease or anabolic steroid use. Ten of them underwent bolus-enhanced dynami...


    pub_type: 杂志文章


    authors: Grazioli L,Federle MP,Ichikawa T,Balzano E,Nalesnik M,Madariaga J

    更新日期:2000-08-01 00:00:00

  • Thyroid Imaging Reporting and Data System (TI-RADS): A User's Guide.

    abstract::In 2017, the Thyroid Imaging Reporting and Data System (TI-RADS) Committee of the American College of Radiology (ACR) published a white paper that presented a new risk-stratification system for classifying thyroid nodules on the basis of their appearance at ultrasonography (US). In ACR TI-RADS, points in five feature ...


    pub_type: 杂志文章,评审


    authors: Tessler FN,Middleton WD,Grant EG

    更新日期:2018-04-01 00:00:00

  • Qualitative Radiogenomics: Association between Oncotype DX Test Recurrence Score and BI-RADS Mammographic and Breast MR Imaging Features.

    abstract::Purpose To evaluate the association between Breast Imaging Reporting and Data System (BI-RADS) mammographic and magnetic resonance (MR) imaging features and breast cancer recurrence risk in patients with estrogen receptor-positive breast cancer who underwent the Oncotype DX assay. Materials and Methods In this institu...


    pub_type: 杂志文章


    authors: Woodard GA,Ray KM,Joe BN,Price ER

    更新日期:2018-01-01 00:00:00

  • Lymphomas: initial reactivation.

    abstract::A total of 299 patients with Stage IA-Stage IIB nodal lymphoma treated by irradiation were evaluated for initial reactivation. The abdomen was the major site of reactivation for patients with supradiaphragmatic Hodgkin's disease. The non-Hodgkin's lymphomas reactivated in a variable fashion. Reactivation was prompt fo...


    pub_type: 杂志文章


    authors: Knapp WT,Fayos JV

    更新日期:1975-12-01 00:00:00

  • Fetal anomalies: comparison of MR imaging and US for diagnosis.

    abstract:PURPOSE:To compare prenatal ultrasonography (US) and magnetic resonance (MR) imaging for the diagnosis of fetal anomalies. MATERIALS AND METHODS:Images of 27 fetuses (28 diagnostic cases) with anomalies diagnosed at US were evaluated; in these fetuses, prenatal MR imaging was performed within 15 days of US. Prenatal U...


    pub_type: 杂志文章


    authors: Frates MC,Kumar AJ,Benson CB,Ward VL,Tempany CM

    更新日期:2004-08-01 00:00:00

  • Ewing sarcoma: MR imaging of chemotherapy-induced changes with histologic correlation.

    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...


    pub_type: 杂志文章


    authors: MacVicar AD,Olliff JF,Pringle J,Pinkerton CR,Husband JE

    更新日期:1992-09-01 00:00:00

  • Mammography with computer-aided detection: reproducibility assessment initial experience.

    abstract:PURPOSE:To examine the performance and reproducibility of a commercially available computer-aided detection (CAD) system with a set of mammograms obtained in 100 patients who had undergone biopsy after positive findings at mammography. MATERIALS AND METHODS:One hundred positive mammographic examinations (four views ea...


    pub_type: 杂志文章


    authors: Zheng B,Hardesty LA,Poller WR,Sumkin JH,Golla S

    更新日期:2003-07-01 00:00:00

  • B-cell non-Hodgkin lymphoma: PET/CT evaluation after 90Y-ibritumomab tiuxetan radioimmunotherapy--initial experience.

    abstract:PURPOSE:To retrospectively compare fusion fluorine 18 fluorodeoxyglucose (FDG) positron emission tomographic (PET)/computed tomographic (CT) imaging with CT imaging alone in the evaluation of yttrium 90 ((90)Y)-ibritumomab tiuxetan radioimmunotherapy treatment of B-cell non-Hodgkin lymphoma. MATERIALS AND METHODS:This...


    pub_type: 杂志文章


    authors: Ulaner GA,Colletti PM,Conti PS

    更新日期:2008-03-01 00:00:00

  • The equivalent tissue-air ratio method for making absorbed dose calculations in a heterogeneous medium.

    abstract::The CT scanner makes three-dimensional anatomical information available for treatment planning, the calculational algorithm being the limiting factor in dose calculations. A method has been developed, called the "effective tissue-air ratio method," that uses all the information but reduces it to manageable proportions...


    pub_type: 杂志文章


    authors: Sontag MR,Cunningham JR

    更新日期:1978-12-01 00:00:00