Difference in Enhancement Between Spin Echo and 3-Dimensional Fast Spoiled Gradient Recalled Acquisition in Steady State Magnetic Resonance Imaging of Brain Metastasis at 3-T Magnetic Resonance Imaging

2008 ◽  
Vol 32 (2) ◽  
pp. 313-319 ◽  
Author(s):  
Kaori Furutani ◽  
Masafumi Harada ◽  
Mahmut Mawlan ◽  
Hiromu Nishitani
Keyword(s):  
Magnetic Resonance Imaging ◽  
Steady State ◽  
Magnetic Resonance ◽  
Brain Metastasis ◽  
Spin Echo ◽  
Resonance Imaging ◽  
3 Dimensional

APPLICATION OF CONTRAST-ENHANCED CONSTRUCTIVE INTERFERENCE IN STEADY STATE MAGNETIC RESONANCE IMAGING TO LEKSELL GAMMAPLAN FOR LOCALIZING C2-C3 ANEURYSMS

Neurosurgery ◽  
2009 ◽  
Vol 65 (6) ◽  
pp. E1188-E1190 ◽  
Author(s):  
Akitsugu Kawashima ◽  
Yoshikazu Okada ◽  
Motohiro Hayashi ◽  
Takakazu Kawamata ◽  
Tomokatsu Hori
Keyword(s):  
Magnetic Resonance Imaging ◽  
Steady State ◽  
Magnetic Resonance ◽  
Cavernous Sinus ◽  
Oculomotor Nerve ◽  
Resonance Imaging ◽  
Constructive Interference ◽  
3 Dimensional ◽  
Anatomic Localization ◽  
C3 Segment

Abstract OBJECTIVE We used gadolinium (Gd)-enhanced constructive interference in steady state (CISS) magnetic resonance imaging with the Leksell GammaPlan (LGP; Elekta AB, Stockholm, Sweden) system for accurate preoperative evaluation of the anatomic localization of intradural and/or extradural C2–C3 aneurysms. METHODS Anatomic localization of 8 unruptured aneurysms of the C2–C3 segment was evaluated using Gd-enhanced CISS imaging with LGP. Four patients diagnosed with intradural aneurysms, 1 with a combined intraextradural aneurysm, and 1 with an intracavernous aneurysm underwent operation. The aneurysmal localizations diagnosed preoperatively by Gd-enhanced CISS imaging with LGP were compared with intraoperative findings. RESULTS By use of Gd-enhanced CISS imaging with LGP, 3-dimensional visualization of the internal carotid artery, aneurysms at the C2–C3 segment, optic nerve, oculomotor nerve, cavernous sinus, and anterior clinoid process was possible in 8 patients. The localization of intradural or combined intra-extradural aneurysms was diagnosed on the basis of the oculomotor nerve and the cavernous sinus depicted in 3-dimensional images. The oculomotor nerve and the cavernous sinus serve as landmarks for the proximal ring on images of the carotico-oculomotor membrane. Intradural or intra-extradural localization of C2–C3 aneurysms with this novel technique was in complete agreement with intraoperative findings in 6 surgical cases. CONCLUSION This study demonstrated the utility of Gd-enhanced CISS imaging used with LGP for accurate preoperative localization of intradural and/or extradural aneurysms at the C2–C3 segments.

Nichtinvasive Beurteilung aortokoronarer Venenbrücken mit Kernspintomographie

1989 ◽  
Vol 28 (06) ◽  
pp. 234-242 ◽  
Author(s):  
U. Sechtem ◽  
Sabine Langkamp ◽  
M. Jungehülsing ◽  
H. H. Hilger ◽  
H. Schicha ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Coronary Artery ◽  
Magnetic Resonance ◽  
Coronary Artery Bypass ◽  
Spin Echo ◽  
Artery Bypass ◽  
Graft Patency ◽  
Coronary Artery Bypass Grafts ◽  
Resonance Imaging ◽  
Low Sensitivity

Fortyfour patients with recent cardiac catheterization because of recurrent chest pain after coronary artery bypass surgery were studied by magnetic resonance imaging to evaluate graft patency. To assess the efficacy of this non-invasive method 92 coronary artery bypass grafts were examined by the spin-echo technique. ECG-gated transversal sections were acquired between the diaphragm and the aortic arch. The specificity of magnetic resonance imaging was 83% (48/58) for patent grafts. However, the sensitivity in the detection of occluded bypasses was only 56% (19/34). Despite the good specificity, clinical applications of this method are limited because of its low sensitivity.

Ocular biometry through fully refocused steady-state magnetic resonance imaging sequence: reliability and agreement with the IOLMaster® 500

2021 ◽  
Author(s):  
Lorenzo Ismael Perez-Sanchez ◽  
Julia Gutierrez-Vazquez ◽  
Maria Satrustegui-Lapetra ◽  
Francisco Ferreira-Manuel ◽  
Juan Jose Arevalo-Manso ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Steady State ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Sequence ◽  
Ocular Biometry ◽  
Imaging Sequence

Ultra high resolution nonenhanced fast spin echo magnetic resonance imaging: Cost-effective screening for acoustic neuroma in patients with sudden sensorineural hearing loss

1998 ◽  
Vol 119 (4) ◽  
pp. 364-369 ◽  
Author(s):  
Robert L. Daniels ◽  
Clough Shelton ◽  
H. Ric Harnsberger
Keyword(s):  
Magnetic Resonance Imaging ◽  
Hearing Loss ◽  
Magnetic Resonance ◽  
Sensorineural Hearing Loss ◽  
Acoustic Neuroma ◽  
Spin Echo ◽  
Sudden Sensorineural Hearing Loss ◽  
Fast Spin Echo ◽  
Resonance Imaging ◽  
Fast Spin

The financial burden for the evaluation of patients for acoustic neuroma in an otolaryngology practice is substantial. Patients with sudden sensorineural hearing loss represent a portion of that population seen with unilateral, asymmetric auditory symptoms who require investigation for acoustic neuroma. For these patients, gadolinium-enhanced magnetic resonance imaging is the diagnostic gold standard. Auditory brain stem response testing has been used in the past as a screening test for acoustic neuroma, but its apparent sensitivity has fallen as the ability to image smaller acoustic neuromas has improved. Fast spin echo magnetic resonance imaging techniques without gadolinium have been shown to be as effective in the detection of acoustic neuroma as contrast-enhanced magnetic resonance imaging. Limited nonenhanced fast spin echo magnetic resonance imaging now provides an inexpensive alternative for high-resolution imaging of the internal auditory canal and cerebellopontine angle. Fast spin echo magnetic resonance imaging can now be done at a cost approximating auditory brain stem response testing while providing the anatomic information of contrast-enhanced magnetic resonance imaging. Cost analysis was done in the cases of 58 patients with sudden sensorineural hearing loss by comparing the costs for routine workup and screening of acoustic neuroma with the cost of fast spin echo magnetic resonance imaging with the use of screening protocols based on literature review. The potential cost savings of evaluating patients with sudden sensorineural hearing loss with fast spin echo magnetic resonance imaging for acoustic neuroma was substantial, with a 54% reduction in screening costs. In an era of medical economic scrutiny, fast spin echo magnetic resonance imaging has become the most cost-effective method to screen suspected cases of acoustic tumors at our institution by improving existing technology while reducing the cost of providing that technology and eliminating charges for impedance audiometry, auditory brain stem response testing, and contrast-enhanced magnetic resonance imaging.

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