Magnetic resonance cisternography for visualization of intracisternal fine structures

Mamata, Yoshiaki; Muro, Isao; Matsumae, Mitsunori; Komiya, Taizo; Toyama, Hiroyuki; Tsugane, Ryuichi; Sato, Osamu

doi:10.3171/jns.1998.88.4.0670

Cited by 41 publications

(21 citation statements)

References 6 publications

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“…Although this study was prospective, the authors did not indicate whether the radiologists were blinded to diagnosis before evaluation of the images. Mamata et al [10] also studied MRI in controls, patients with essential hypertension, and patients with secondary hypertension. Patients with essential hypertension had a much higher incidence of vascularinduced brainstem compression.…”

Section: Historical and Anatomic Perspectivementioning

confidence: 96%

Brainstem compression as a cause of neurogenic hypertension

Horowitz

1999

Current Science Inc

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Primary or essential hypertension affects more than 50 million Americans, more than 6 million of whom cannot achieve adequate control of their condition with medication. The current neurophysiologic literature indicates that some forms of primary hypertension may be secondary to compression of the left rostral ventrolateral medulla near the root entry zones of cranial nerves 9 and 10 by arteries or veins. Surgical brainstem decompression may alleviate this hypertension or make it medically controllable. This paper reviews the experimental, anatomic, and clinical literature that supports the neurogenic theory of hypertension.

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Section: Historical and Anatomic Perspectivementioning

confidence: 96%

Brainstem compression as a cause of neurogenic hypertension

Horowitz

1999

Current Science Inc

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“…10) This MR sequence has been utilized in the treatment of cochlear disease, 7) cerebellopontine angle tumor, 11) microvascular decompression, 12) or vertebrobasilar diseases. 8) We employed serial coronal sections of heavily T2-weighted images for depicting occluded arteries.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Heavily T2-weighted MRI to Diagnose Vessel Course Distal to Occluded Artery in Mechanical Thrombectomy for Acute Ischemic Stroke

Minami

Yoshida

Hanayama

et al. 2018

JNET

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Objective: In endovascular thrombectomy for acute ischemic stroke due to large-vessel occlusion, occluded vessels are invisible on MRA or DSA. Heavily T2-weighted MRI sequence, which offers good contrast between cerebrospinal fluid and other brain structures, may contribute to resolve this issue. This study aimed to evaluate the efficacy of this sequence in estimating vessel courses including unexpected aneurysms of the portion more distal to the occlusion site in endovascular thrombectomy. Methods:In all, 23 consecutive patients diagnosed with acute ischemic stroke due to large-vessel occlusion underwent endovascular thrombectomy subsequent to evaluation of several thin-slice coronal sections of heavily T2-weighted MRI in addition to the usual diagnostic MRI. To clarify the usefulness of the heavily T2-weighted MRI, the matching degree of vessel courses diagnosed using this sequence before and after recanalization, intra-or postoperative subarachnoid hemorrhage, reperfusion rate of thrombolysis in cerebral infarction (TICI) 2b-3, and the rate of functional independence (modified Rankin Scale [mRS] score ≤ 2) at 90 days were assessed. And also the following time intervals were calculated: start of imaging to arterial puncture, arterial puncture to first deployment of device, and arterial puncture to reperfusion. Results:The site of occlusion at diagnosis was the internal cerebral artery (ICA) in eight patients, the middle cerebral artery (MCA) in 13, and the anterior cerebral artery and basilar artery in 1 each. The matching of vessel courses before and after treatment was observed in 20 patients (91.3%) except for two patients that useful images could not be provided because of intense body movement and a technical failure. Procedure-related subarachnoid hemorrhage was not recognized in any patient. Successful recanalization of TICI 2b-3 was achieved in 82.6%. The median time from start of imaging to arterial puncture was 51 minutes (interquartile range [IQR]: 38.75-72), arterial puncture to first deployment of device was 41 minutes (32-57), placement of a guiding catheter or completion of carotid stenting to first deployment of device was 20 minutes (13.75-28.5), and arterial puncture to reperfusion was 59 minutes (43.5-99.5), respectively.Functional independence (mRS ≤2) at 90 days was achieved in 43.5% of patients. Heavily T2-weighted MRI was extremely useful in facilitating secure navigation of a microguidewire and microcatheter into invisible vessels during thrombectomy by confirming the courses of occluded vessels in advance. On the other hand, this sequence neither delayed the time to arterial puncture remarkably nor reduced the time required for procedure by estimating of occluded vessels. Conclusion:The heavily T2-weighted MRI sequence can contribute to improve the safety of maneuvers by clarifying the course of occluded vessels in endovascular thrombectomy for large-vessel occlusion.Keywords▶ heavily T2-weighted magnetic resonance imaging, cerebral aneurysm, mechanical thrombectomy, large-vessel occlu...

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“…The time required for 13 images in one direction was 3 minutes and 48 seconds [7]. Pulse gating system, which increased imaging time, was used to reduce CSF related artifacts [7]. In this sequence, CSF was low-signaled and other structures were shown in higher intensity of various degrees including vascular components.…”

Section: Mr Apparatusmentioning

confidence: 99%

“…Sequence parameters used were TR 5800 msec and TE 220 msec, 200 mm field of view, slice thickness of 3 mm and interslice gap of 0.5 mm, 284 Â 512 pixel matrix, echo train length of 23, and 4 excitations. The time required for 13 images in one direction was 3 minutes and 48 seconds [7]. Pulse gating system, which increased imaging time, was used to reduce CSF related artifacts [7].…”

Section: Mr Apparatusmentioning

confidence: 99%

“…The standard clinical MR imaging studies are most commonly used to provide T1, T2 and proton densityweighted images and depending on the clinical situation, intravenous contrast-enhanced T1 weighted images [14]. Besides these common MR sequences, the heavily T2 weighted MR images have been highlighted in depicting fine cisternal structures [5,7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heavily T2 Weighted MR Images of Anterior Optic Pathways in Patients with Sellar and Parasellar Tumours - Prediction of Surgical Anatomy

Saeki

Murai

Kubota

et al. 2002

Acta Neurochirurgica

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Magnetic resonance cisternography for visualization of intracisternal fine structures

Abstract: Magnetic resonance cisternography appears to show great promise for evaluation of patients with neurovascular compression or tumors in and around the basal cisterns; the procedure adds only a small amount of imaging time.

Cited by 41 publications

References 6 publications

Brainstem compression as a cause of neurogenic hypertension

Brainstem compression as a cause of neurogenic hypertension

Efficacy of Heavily T2-weighted MRI to Diagnose Vessel Course Distal to Occluded Artery in Mechanical Thrombectomy for Acute Ischemic Stroke

Heavily T2 Weighted MR Images of Anterior Optic Pathways in Patients with Sellar and Parasellar Tumours - Prediction of Surgical Anatomy

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