Carolyn VanDyke
Cleveland Clinic
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Publication
Featured researches published by Carolyn VanDyke.
Journal of Thoracic Imaging | 1994
Carolyn VanDyke; Richard D. White
Congenital variations in the development of the thoracic aorta are common. Although there is a spectrum of disease in all age groups, arch anomalies that present in childhood and those that present in the adult tend to be of differing types. Imaging of the arch and its branches, the descending aorta, and the ductus arteriosus or ligamentum arteriosum define the morphology of the arch and permit a reasonable prediction of accompanying congenital heart disease and/or vascular ring.
Journal of Computer Assisted Tomography | 1992
Carolyn VanDyke; Michael T. Modic; Sarah M. Beale; Sundar C. Amartur; Jeffrey S. Ross
A three-dimensional (3D) fast imaging with steady state precession sequence structured to maintain constant phase at the radiofrequency pulse, in the presence of motion, was employed to produce high signal intensity of the CSF relative to the extradural and neural structures in 170 consecutive spine MR examinations. In addition to displaying the resulting partitions as two-dimensional (2D) images, the acquisition was subjected to a maximum intensity projection postprocessing algorithm for viewing at multiple angles. The projected images demonstrated a global view of the thecal sac and the dural root sleeves. The global depiction of the thecal sac and root sleeves was equivalent to contrast myelography in 15 patients where comparisons were available. These projection myelographic images, used in conjunction with 2D and reformatted 3D cross-sectional images, may provide clinical services with enough information (in a format with which they are comfortable) to eventually eliminate the need for contrast myelography in the evaluation of extradural disease.
Journal of Computer Assisted Tomography | 1994
Richard D. White; Nancy A. Obuchowski; Carolyn VanDyke; Jean A. Tkach; Michael A. Geisinger; Kerry M. Link; Paul Ruggieri; John J. Dillinger; Bruce W. Lytle
Objective Use of MRA for thoracic aortic disease (TAD) evaluation has been limited. This report describes an initial experience with TAD evaluation using a single MRA volume series. Materials and Methods A single volume series, based on sequential 2D TOF MRA, was acquired in 30 cases (28 with suspected TAD and 2 normals). Each series was processed using multiplanar reconstruction (MPR) and maximum intensity projection (MIP); resulting tomographic (one base and two MPR) and MIP sets were blindly interpreted by four reviewers to detect TAD and, if present, to diagnose its specific form. For cases incorrectly interpreted, the standard MR images were subsequently interpreted. Results The TAD categories included aneurysm (n = 13), dissection (n = 9), and arch anomalies (n = 5). Sensitivities were high for TAD overall (89–100%) and TAD in ascending and descending portions; sensitivities were lower for TAD of the arch (two of four reviewers ≥=90% for TAD overall and descending TAD). Specificities for TAD overall had a wider range (67–100%), but were high for ascending, arch, and descending portions (three to four of four reviewers ≥90% for each). Sensitivities for aneurysms (69–92%) and dissections overall (67–100%) were comparable, as they were in ascending and arch portions; descending dissection was better detected than descending aneurysm (two of four reviewers ≥90% for ascending or arch aneurysm and for descending dissection); overall specificities (88–100 vs. 81–95%) and specificities in ascending, arch, and descending portions were also comparable (three to four of four reviewers ≥90% for both in each portion; two of four reviewers ≥90% for dissection overall). Each reviewer achieved ≥70% diagnostic accuracy for TAD (one of four reviewers = 85%); accuracies for each category were comparable. Interpretation of standard MR images corrected all detection and most diagnostic (≥63%) errors. Conclusion This initial experience with conventional TOF MRA for TAD evaluation is encouraging, but it indicates the potential for advancements in data acquisition and/or postprocessing.
Journal of Computer Assisted Tomography | 1992
Manjuhl Shah; Jeffrey S. Ross; Carolyn VanDyke; Richard A. Rudick; Donald E. Goodkin; Nancy A. Obuchowski; Michael T. Modic
Three-dimensional (3D) volume turbo fast low angle shot (FLASH) techniques have become available which produce heavily T1-weighted images, similar to inversion recovery scans, utilizing the appropriate flip angle and inversion time. The purpose of this study was to compare the sensitivity of a rapid volume gradient echo technique [3D magnetization prepared rapid acquisition gradient echo (MP RAGE)] in identifying multiple sclerosis (MS) plaques with a conventional T2-weighted spin echo (SE) sequence. Ten patients with clinical MS were evlauated. Patients underwent a routine examination consisting of an axial T2-weighted SE sequence (2,500,22/90) and a coronal 3D MP RAGE, 10/4/10, acquired as 128 two mm partitions. In dix patients, area measurements of 22 plaques were determined on both the axial T2-weighted SE examinations and the axial reformatted MP RAGE examinations. The overall number of plaques utilizing each technique was approximately the same. One hundred twenty-two plaques were visualized for the 3D MP RAGE sequence, and 128 plaques for the T2-weighted SE sequence. There were differences in detection of plaques in different regions, with plaques in gray matter better demonstrated utilizing the conventional T2-weighted SE sequence. Plaques in the corpus callosum, pons, and brachia pontis were better demonstrated utilizing 3D MP RAGE. No significant difference was found between the areas measured on the MP RAGE sequence and on the T2-weighted SE sequence. Three-dimensional MP RAGE provides a sensitive and complementary method to conventional T2-weighted SE sequences in the evaluation of patients with MS.
Radiology | 1997
John G. Murray; Metin Manisali; Scott D. Flamm; Carolyn VanDyke; Michael L. Lieber; Bruce W. Lytle; Richard D. White
American Journal of Roentgenology | 1989
Jeffrey S. Ross; R Delamarter; Mark G. Hueftle; Thomas J. Masaryk; Masamichi Aikawa; John R. Carter; Carolyn VanDyke; Michael T. Modic
Radiology | 1998
Richard D. White; Richard G. Trohman; Scott D. Flamm; Carolyn VanDyke; Robert J. Optican; Richard Sterba; Nancy A. Obuchowski; Mark D. Carlson; Patrick Tchou
American Journal of Neuroradiology | 1989
Jeffrey S. Ross; Richard Delamarter; Mark G. Hueftle; Thomas J. Masaryk; Masamichi Aikawa; John R. Carter; Carolyn VanDyke; Michael T. Modic
Journal of Magnetic Resonance Imaging | 1991
Jeffrey S. Ross; Jean A. Tkach; Carolyn VanDyke; Michael T. Modic
American Journal of Neuroradiology | 1989
Carolyn VanDyke; Jeffrey S. Ross; Jean A. Tkach; Thomas J. Masaryk; Michael T. Modic