J.A. Frank
National Institutes of Health
45 Papers
621 Citations
J.A. Frank is an academic researcher from National Institutes of Health. The author has contributed to research in topics: Magnetic resonance imaging & Medicine. The author has an hindex of 25, co-authored 45 publications.
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Papers
Magnetization transfer contrast: MR imaging of the knee.
TL;DR: It is demonstrated that MTC can improve contrast in standard single-section, gradient-recalled-echo images of the knee and generate useful cartilage-synovial fluid contrast on high-resolution three-dimensional images, in which contrast is difficult to generate.
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Statistical analysis of functional MRI data in the wavelet domain
Urs E. Ruttimann,Michael Unser,Robert R. Rawlings,Daniel E. Rio,N.F. Ramsey,Venkata S. Mattay,Daniel W. Hommer,J.A. Frank,Daniel R. Weinberger +8 more
TL;DR: The proposed method was applied to compare two different fMRI acquisition modalities, and differences of the respective useful signal bandwidths could be clearly demonstrated; the estimated signal, due to the smoothness of the wavelet representation, yielded more compact regions of neuroactivity than standard spatial-domain testing.
Short-Ti inversion-recovery pulse sequence: analysis and initial experience in cancer imaging.
TL;DR: STIR images demonstrated tumor as a conspicuously high-intensity area in a background of muted, discernible anatomic detail and consolidated into a single image the information contained separately on T1- and T2-weighted images, which facilitates efficient detection and localization of malignancy.
163
Pituitary adenomas in patients with Cushing disease: initial experience with Gd-DTPA-enhanced MR imaging.
Andrew J. Dwyer,J.A. Frank,J L Doppman,Edward H. Oldfield,A M Hickey,G B Cutler,D. L. Loriaux,T F Schiable +7 more
TL;DR: Serial T1-weighted images disclosed early enhancement of the pituitary gland and delayed enhancement ofThe cystic adenomas, and the discrepancy in times to peak enhancement accounted for improved lesion/pituitary contrast in some early images and for reversal or diminution of lesion-pituitARY contrast in later images.
162
Gastrinomas: comparison of MR imaging with CT, angiography, and US.
Harold Frucht,John L. Doppman,Jeffrey A. Norton,Donald L. Miller,Andrew J. Dwyer,J.A. Frank,Rakesh Vinayek,Paul N. Maton,Robert T. Jensen +8 more
TL;DR: MR imaging is generally not useful in the initial attempt to localize gastrinomas, and was as effective as abdominal US but less effective than either CT scanning or selective abdominal angiography for the detection of extrahepatic gastrinoma.
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