scholarly journals Agreement between transverse T2-weighted and three-dimensional constructive interference in steady state sequences in the evaluation of spinal cord disease in dogs

2018 ◽  
Vol 182 (26) ◽  
pp. 745-745
Author(s):  
Maria Oliveira ◽  
James Fraser McConnell ◽  
Thomas W Maddox ◽  
Daniel Sanchez-Masian ◽  
Rita Gonçalves
Keyword(s):  
Spinal Cord ◽  
Steady State ◽  
Spin Echo ◽  
Small Animal ◽  
Intensity Change ◽  
Treatment Recommendation ◽  
Categorical Variables ◽  
Constructive Interference ◽  
Spinal Cord Disease ◽  
Ciss Sequence

The constructive interference in steady state (CISS) sequence has been widely used in human neuroimaging. It has been shown to be advantageous in the evaluation of intra-axial and extra-axial cystic abnormalities, arteriovenous and dysraphic malformations and disturbances of cerebrospinal fluid circulation. To assess the utility of this technique in small animals, interpretations based on this sequence were compared with those based on T2-weighted (T2W) sequences in 145 dogs that underwent MRI of the spine for suspected spinal cord disease. Two sets of images (T2W and CISS) were reviewed separately by three observers in random order and intraobserver and interobserver agreements between both sequences were evaluated for several categorical variables. The overall agreement between T2W and CISS sequences was good. The highest agreement was observed for lesion diagnosis (0.739<k<0.928), treatment recommendation (0.715<k<0.833) and degree of spinal cord compression (0.772<k<0.952). The agreement for intramedullary intensity change (0.192<k<0.332) was lower compared with the other variables. Lesions that were predominantly characterised by focal hyperintense parenchymal changes on T2W were in some instances undetected on the CISS sequence while lesions consistent with spinal arachnoid diverticula on CISS sequences were occasionally missed on T2W. CISS enabled demonstration that lesions were directly affecting associated spinal nerves in some cases where T2W sequence was equivocal. Although CISS does not replace standard spin echo sequences, the results support inclusion of this sequence in small animal spinal MRI studies when subarachnoid diverticula or spinal nerve compression is suspected.

Three-dimensional constructive interference in steady-state magnetic resonance imaging in syringomyelia: advantages over conventional imaging

2008 ◽  
Vol 8 (5) ◽  
pp. 429-435 ◽  
Author(s):  
Florian Roser ◽  
Florian H. Ebner ◽  
Søren Danz ◽  
Felix Riether ◽  
Rainer Ritz ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Steady State ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Preoperative Evaluation ◽  
Motion Artifacts ◽  
Csf Flow ◽  
Constructive Interference ◽  
Detection Rates ◽  
Mr Sequences

Object Neuroradiology has become indispensable in detecting the pathophysiology in syringomyelia. Constructive interference in steady-state (CISS) magnetic resonance (MR) imaging can provide superior contrast at the sub-arachnoid tissue borders. As this region is critical in preoperative evaluation, the authors hypothesized that CISS imaging would provide superior assessment of syrinx pathology and surgical planning. Methods Based on records collected from a database of 130 patients with syringomyelia treated at the authors' institution, 59 patients were prospectively evaluated with complete neuroradiological examinations. In addition to routine acquisitions with FLAIR, T1- and T2-weighted, and contrast-enhanced MR imaging series, the authors obtained sagittal cardiac-gated sequences to visualize cerebrospinal fluid (CSF) pulsations and axial 3D CISS MR sequences to detect focal arachnoid webs. Statistical qualitative and quantitative evaluations of spinal cord/CSF contrast, spinal cord/CSF delineation, motion artifacts, and artifacts induced by pulsatile CSF flow were performed. Results The 3D CISS MR sequences demonstrated a contrast-to-noise ratio significantly better than any other routine imaging sequence (p < 0.001). Moreover, 3D CISS imaging can detect more subarachnoid webs and cavitations in the syrinx than T2-weighted MR imaging with less flow-void artifact. The limitation of 3D CISS imaging is a susceptibility to motion artifacts that can cause reduced spatial resolution. Lengthy acquisition times for axial segments can be reduced with multiplanar reconstruction of 3D CISS–generated sagittal images. Conclusions Constructive interference in steady-state imaging is the MR sequence of choice in the preoperative evaluation of syringomyelia, allowing significantly higher detection rates of focal subarachnoid webs, whereas standard T2-weighted MR imaging shows turbulent CSF flow voids. Constructive interference in steady-state MR imaging enables the neurosurgeon to accurately identify cases requiring decompression for obstructed CSF. Motion artifacts can be eliminated with technical variations.

scholarly journals Evaluation of syringomyelia with three-dimensional constructive interference in a steady state (CISS) sequence

2000 ◽  
Vol 11 (2) ◽  
pp. 120-126 ◽  
Author(s):  
Toshinori Hirai ◽  
Yukunori Korogi ◽  
Yoshinori Shigematsu ◽  
Takeshi Sugahara ◽  
Mutsumasa Takahashi ◽  
...  
Keyword(s):  
Steady State ◽  
Three Dimensional ◽  
Constructive Interference ◽  
Ciss Sequence

scholarly journals Comparison of Constructive Interference in Steady-State and T1-Weighted MRI Sequence at Detecting Pituitary Adenomas in Cushing's Disease Patients

2018 ◽  
Vol 79 (06) ◽  
pp. 593-598 ◽  
Author(s):  
Min Lang ◽  
Ghaith Habboub ◽  
Doksu Moon ◽  
Abin Bandyopadhyay ◽  
Danilo Silva ◽  
...  
Keyword(s):  
Steady State ◽  
Pituitary Adenoma ◽  
Cushing’S Disease ◽  
Pituitary Adenomas ◽  
Cushing's Disease ◽  
Breath Hold ◽  
Mri Imaging ◽  
Constructive Interference ◽  
Ciss Sequence ◽  
Magnetic Resonance Imaging Mri

Background T1-weighted magnetic resonance imaging (MRI) remains the standard pituitary imaging sequence. However, up to 50% of pituitary adenomas are missed with standard imaging in Cushing's disease (CD) patients. Utility of other imaging sequences needs be explored. Objective To compare a T2-gradient echo sequence, constructive interference in steady state (CISS), with a contrast-enhanced (CE) T1-weighted sequence, volume-interpolated breath-hold examination (VIBE), in the detection of pituitary adenomas in CD patients. Design Retrospective analysis of CD patients who underwent endoscopic transsphenoidal pituitary adenomectomy at our institution. Patients and Measurement Twelve patients were included in the study. Two neuroradiologists, who were blinded to the patients' clinical and surgical findings, independently reviewed the CE-VIBE and CISS images. Localization of pituitary adenoma from imaging was compared with intraoperative localization. Results The averaged sensitivity of detecting pituitary adenoma in CD patients was not significantly different between CE-VIBE sequence (63%) and CISS sequence (54%). The positive predictive value was 75% (Observer A) and 100% (Observer B) with CE-VIBE sequence, and 64% (Observer A) and 100% (Observer B) with CISS sequence. In two patients, pituitary adenoma was easily localized with CISS sequence but hard to detect with CE-VIBE sequence. In two other patients, the adenoma was much better delineated on CE-VIBE sequence. Conclusion In our series, the addition of CISS sequence to T1-weighted MRI imaging protocols improved the detection of pituitary adenomas in CD patients. CISS sequence may be a useful adjunct to T1-weighted pituitary MRI protocols and an appropriate alternative for patients with gadolinium contraindications.

Evaluation of small hypothalamic hamartomas with 3D constructive interference in steady state (CISS) sequence

2005 ◽  
Vol 47 (3) ◽  
pp. 204-208 ◽  
Author(s):  
Masayuki Yamura ◽  
Toshinori Hirai ◽  
Yukunori Korogi ◽  
Mika Kitajima ◽  
Yoshiko Hayashida ◽  
...  
Keyword(s):  
Steady State ◽  
Constructive Interference ◽  
Hypothalamic Hamartomas ◽  
Ciss Sequence

Small Animal Spinal Cord Disease

2021 ◽  
pp. 267-311
Author(s):  
Alexander de Lahunta ◽  
Eric Glass ◽  
Marc Kent
Keyword(s):  
Spinal Cord ◽  
Small Animal ◽  
Spinal Cord Disease
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