scholarly journals A Volumetric Metric for Monitoring Intracranial Aneurysms: Repeatability and Growth Criteria in a Longitudinal MR Imaging Study

2021 ◽  
Author(s):  
X. Liu ◽  
H. Haraldsson ◽  
Y. Wang ◽  
E. Kao ◽  
M. Ballweber ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Intracranial Aneurysms ◽  
Imaging Study

Accelerated spondylotic changes adjacent to the fused segment following central cervical corpectomy: magnetic resonance imaging study evidence

2004 ◽  
Vol 100 (1) ◽  
pp. 2-6 ◽  
Author(s):  
Vaijayantee Kulkarni ◽  
Vedantam Rajshekhar ◽  
Lakshminarayan Raghuram
Keyword(s):  
Magnetic Resonance ◽  
Mr Imaging ◽  
Imaging Study ◽  
Degenerative Changes ◽  
Adjacent Segment ◽  
Mr Images ◽  
Short Term ◽  
Content Type ◽  
Fine Print

Object. The authors studied whether cervical spine motion segments adjacent to a fused segment exhibit accelerated degenerative changes on short-term follow-up magnetic resonance (MR) imaging. Methods. Preoperative and short-term follow-up (mean duration 17.5 months, range 10–48 months) cervical MR images obtained in 44 patients who had undergone one- or two-level corpectomy for cervical spondylotic myelopathy were evaluated qualitatively and quantitatively. The motion segment adjacent to the fused segment and a segment remote from the fused segment were evaluated for indentation of the thecal sac, disc height, and sagittal functional diameter of the spinal canal on midsagittal T2-weighted MR images. Thecal sac indentations were classifed as mild, moderate, and severe. New indentations of the thecal sac of varying severity (mild in 17 patients [38.6%], moderate in 10 [22.7%], and severe in six [13.6%]) had developed at the adjacent segments in 33 (75%) of 44 patients. The degenerative changes were seen at the superior level in 11 patients, inferior level in 10 patients, and at both levels in 12 patients and resulted from both anterior and posterior element degeneration in the majority (23 [69.6%]) of patients. The remote segments showed mild thecal sac indentations in seven patients and moderate indentations in two patients (nine [20.5%] of 44). Compared with the changes at the remote segment, the canal size was significantly decreased at the superior adjacent segment by 0.9 mm (p = 0.007). No patient sustained a new neurological deficit due to adjacent-segment changes. Conclusions. On short-term follow-up MR imaging, levels adjacent to the fused segment exhibited more pronounced degenerative changes (compared with remote levels) in 75% of patients who had undergone one- or two-level central corpectomy.

Small (< 10-mm) incidentally found intracranial aneurysms, Part 1: reasons for detection, demographics, location, and risk factors in 212 consecutive patients

2011 ◽  
Vol 31 (6) ◽  
pp. E3 ◽  
Author(s):  
Ioannis Loumiotis ◽  
Anne Wagenbach ◽  
Robert D. Brown ◽  
Giuseppe Lanzino
Keyword(s):  
Risk Factors ◽  
Subarachnoid Hemorrhage ◽  
Intracranial Aneurysms ◽  
Imaging Techniques ◽  
Imaging Study ◽  
Consecutive Series ◽  
Common Location ◽  
Unruptured Intracranial Aneurysms ◽  
Paraclinoid Aneurysms ◽  
History Of

Object The widespread use of imaging techniques for evaluating nonspecific symptoms (vertigo, dizziness, memory concerns, unsteadiness, and the like) and focal neurological symptoms related to cerebrovascular disease has led to increased identification of asymptomatic incidentally discovered unruptured intracranial aneurysms (UIAs). The management of these incidental aneurysms is controversial and many factors need to be considered. The authors describe reasons leading to diagnosis, demographics, and risk factors in a large consecutive series of patients with small incidentally found UIAs. Methods The authors prospectively evaluated 335 patients harboring 478 small (< 10-mm) UIAs between January 2008 and May 2011. Patients with known aneurysms, possibly symptomatic aneurysms, arteriovenous malformation–related aneurysms, patients with a history of subarachnoid hemorrhage from another aneurysm, and patients harboring extradural aneurysms were excluded from the analysis. Only truly incidental small aneurysms (272 aneurysms in 212 patients) were considered for the present analysis. Data regarding the reason for detection, demographics, location, and presence of potential risk factors for aneurysm formation were prospectively collected. Results There were 158 female (74.5%) and 54 male (25.5%) patients whose mean age was 60.6 years (median 62 years). The most common reason for undergoing the imaging study that led to a diagnosis of the aneurysms was evaluation for nonspecific spells and symptoms related to focal cerebrovascular ischemia (43.4%), known/possible intracranial or neck pathology (24%), and headache (16%). The most common location (27%) of the aneurysm was the middle cerebral artery; the second most common (22%) was the paraclinoid internal carotid artery (excluding cavernous sinus aneurysms). Sixty-nine percent of patients were current or prior smokers, 60% had a diagnosis of hypertension, and 23% had one or more relatives with a history of intracranial aneurysms with or without subarachnoid hemorrhage. Conclusions Small incidental UIAs are more commonly diagnosed in elderly individuals during imaging performed to investigate ill-defined spells or focal cerebrovascular ischemic symptoms, or during the evaluation of known or probable unrelated intracranial/neck pathology. Hypertension, smoking, and family history of aneurysms are common in this patient population, and the presence of these risk factors has important implications for treatment recommendations. Although paraclinoid aneurysms (excluding intracavernous aneurysms) are uncommon in patients with ruptured intracranial aneurysms, this location is very common in patients with small incidental UIAs.

scholarly journals Regional and Global Biventricular Function in Pulmonary Arterial Hypertension: A Cardiac MR Imaging Study

Radiology ◽  
2013 ◽  
Vol 266 (1) ◽  
pp. 114-122 ◽  
Author(s):  
Monda L. Shehata ◽  
Ahmed A. Harouni ◽  
Jan Skrok ◽  
Tamer A. Basha ◽  
Danielle Boyce ◽  
...  
Keyword(s):  
Pulmonary Arterial Hypertension ◽  
Mr Imaging ◽  
Arterial Hypertension ◽  
Imaging Study ◽  
Cardiac Mr ◽  
Biventricular Function ◽  
Pulmonary Arterial

Hydatid disease: MR imaging study.

Radiology ◽  
1990 ◽  
Vol 175 (3) ◽  
pp. 701-706 ◽  
Author(s):  
S A Marani ◽  
G C Canossi ◽  
F A Nicoli ◽  
G P Alberti ◽  
S G Monni ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Hydatid Disease ◽  
Imaging Study

Data-driven Grading of Brain Gliomas: A Multiparametric MR Imaging Study

Radiology ◽  
2014 ◽  
Vol 272 (2) ◽  
pp. 494-503 ◽  
Author(s):  
Massimo Caulo ◽  
Valentina Panara ◽  
Domenico Tortora ◽  
Peter A. Mattei ◽  
Chiara Briganti ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Imaging Study ◽  
Data Driven ◽  
Brain Gliomas

scholarly journals Brain Development in Fetuses of Mothers with Diabetes: A Case-Control MR Imaging Study

2017 ◽  
Vol 38 (5) ◽  
pp. 1037-1044 ◽  
Author(s):  
F.C. Denison ◽  
G. Macnaught ◽  
S.I.K. Semple ◽  
G. Terris ◽  
J. Walker ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Brain Development ◽  
Imaging Study ◽  
Case Control
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