scholarly journals Superiority of constructive interference in steady-state MRI sequencing over T1-weighted MRI sequencing for evaluating cavernous sinus invasion by pituitary macroadenomas

2019 ◽  
Vol 130 (2) ◽  
pp. 352-359 ◽  
Author(s):  
Min Lang ◽  
Danilo Silva ◽  
Lu Dai ◽  
Varun R. Kshettry ◽  
Troy D. Woodard ◽  
...  
Keyword(s):  
Steady State ◽  
Cavernous Sinus ◽  
Preoperative Assessment ◽  
Roc Curves ◽  
Breath Hold ◽  
Gradient Echo ◽  
Patient Counseling ◽  
Constructive Interference ◽  
Cavernous Sinus Invasion ◽  
Pituitary Macroadenomas

OBJECTIVEPreoperatively determining the extent of parasellar invasion of pituitary macroadenomas is useful for surgical planning and patient counseling. Here, the authors compared constructive interference in steady state (CISS), a T2-weighted gradient-echo MRI sequence, to volume-interpolated breath-hold examination (VIBE), a T1-weighted gradient-echo MRI sequence, for evaluation of cavernous sinus invasion (CSI) by pituitary macroadenomas.METHODSVIBE and CISS images of 98 patients with pituitary macroadenoma were retrospectively analyzed and graded using the modified Knosp classification. The Knosp grades were correlated to surgical findings of CSI, which were determined intraoperatively using 0° and 30° endoscopes. The predictive accuracies for CSI according to the Knosp grades derived from the CISS and VIBE images were compared using receiver operating characteristic (ROC) curves. Postoperative MRI was used to evaluate the gross-total resection (GTR) rates.RESULTSThe CSI rate by pituitary macroadenomas was 27.6% (27 of 98 cases). Of 196 assessments (left and right sides of 98 macroadenomas), 45 (23.0%) had different Knosp grades when scored using VIBE versus CISS images. For the VIBE images, 0% of Knosp grade 0, 4.5% of grade 1, 23.8% of grade 2, 42.1% of grade 3A, 100% of grade 3B, and 83.3% of grade 4 macroadenomas were found to have CSI intraoperatively. For the CISS images, 0% of Knosp grade 0, 2.1% of grade 1, 31.3% of grade 2, 56.3% of grade 3A, 100% of grade 3B, and 100% of grade 4 macroadenomas were found to have CSI intraoperatively. Two pituitary macroadenomas were classified as grade 4 on VIBE sequences but grades 3A and 2 on CISS sequences; CSI was not observed intraoperatively in both cases. The GTR rate was 64.3% and 60.0% for high-grade (3A, 3B, and 4) macroadenomas classified using VIBE and CISS sequences, respectively. The areas under the ROC curves were 0.94 and 0.97 for VIBE- and CISS-derived Knosp grades (p = 0.007), respectively.CONCLUSIONSKnosp grades determined using CISS sequence images are better correlated with intraoperative CSI than those determined using VIBE sequence images. CISS sequences may be valuable for the preoperative assessment of pituitary macroadenomas.

scholarly journals Cavernous sinus invasion by pituitary macroadenomas: neuroradiological, clinical and surgical correlation

1998 ◽  
Vol 56 (1) ◽  
pp. 107-110 ◽  
Author(s):  
ARTHUR CUKIERT ◽  
MARIO ANDRIOLI ◽  
JAYME GOLDMAN ◽  
MARCIA NERY ◽  
LUIS SALGADO ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Cavernous Sinus ◽  
Gold Standard ◽  
Pituitary Tumors ◽  
Medial Wall ◽  
Cavernous Sinus Invasion ◽  
Mri Features ◽  
Pituitary Macroadenomas

The classical imaging gold-standard for this diagnosis is the presence of tumor lateral to the carotid artery. Seventeen patients with pituitary macroadenomas with intraoperative confirmation of cavernous sinus invasion were studied with MRI. Only 8 patients had tumor lateral to the carotid artery; 13 had tumor within the carotid syphon and all lacked the ring enhancement of the medial wall of the cavernous sinus. In 10 patients, widening of the posterior double leaflets of the cavernous sinus could be. All patients were operated by the transesphenoidal route. Only one patient was cured by surgery alone. Only 3 patients disclosing the above mentioned MRI features were identified in a series of 250 patients and did not have cavernous sinus invasion. The present criteria proved to be useful in the pre-operative diagnosis of cavenous sinus invasion and patients' counselling. Pre-operative diagnosis of cavernous sinus invasion of pituitary tumors has a great impact in the management of such patients.

Transcavernous surgery; an effective treatment for pituitary macroadenomas

1995 ◽  
Vol 133 (2) ◽  
pp. 156-165 ◽  
Author(s):  
Akira Matsuno ◽  
Tomio Sasaki ◽  
Nobuhito Saito ◽  
Toshihiro Mochizuki ◽  
Takamitsu Fujimaki ◽  
...  
Keyword(s):  
Effective Treatment ◽  
Cavernous Sinus ◽  
Transsphenoidal Surgery ◽  
Elevated Serum ◽  
Serum Levels ◽  
Pituitary Hormones ◽  
Cavernous Sinus Invasion ◽  
Stimulation Tests ◽  
Sufficient Degree ◽  
Pituitary Macroadenomas

Matsuno A, Sasaki T, Saito N, Mochizuki T, Fujimaki T, Kirino T, Takakura K. Transcavernous surgery; an effective treatment for pituitary macroadenomas. Eur J Endocrinol 1995:133:156–65. ISSN 0804–4643 The endocrinological outcome in four patients with pituitary macroadenomas laterally invading the cavernous sinus, who were treated surgically by the transcranial transcavernous approach, was compared with that in four patients with macroadenomas that had been removed transsphenoidally. The decrease in the elevated serum levels of anterior pituitary hormones after transcavernous surgery ranged from 58.4% to 90.1%, whereas after transsphenoidal surgery it ranged from 0% to 46.1%. The responsiveness of pituitary hormones to stimulation tests was restored and maintained after transcranial transcavernous surgery. Transsphenoidal surgery achieved neither sufficient tumor reduction nor produced a satisfactory endocrinological remission. When cavernous sinus invasion is suspected by magnetic resonance imaging, even if it cannot be confirmed with certainty, transcranial transcavernous surgery is recommended. It is a useful surgical procedure for obtaining a sufficient degree of tumor extirpation and satisfactory endocrinological improvement in patients with macro-adenomas laterally invading the cavernous sinus, particularly somatotroph or corticotroph macro-adenomas. Postoperatively, mild cranial nerve paresis may occur, but this may resolve in 1–4 months. Akira Matsuno, Department of Neurosurgery, Teikyo University Ichihara Hospital, 3426-3 Anegasaki, Ichihara City, Chiba 299-01, Japan

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.

scholarly journals Resection of pituitary macroadenomas via the pseudocapsule along the posterior tumor margin: a cohort study and technical note

2018 ◽  
Vol 128 (2) ◽  
pp. 422-428 ◽  
Author(s):  
Davis G. Taylor ◽  
John A. Jane ◽  
Edward H. Oldfield
Keyword(s):  
Cohort Study ◽  
Cavernous Sinus ◽  
Residual Tumor ◽  
Maximum Diameter ◽  
Preoperative Imaging ◽  
Cavernous Sinus Invasion ◽  
Normal Gland ◽  
Group A ◽  
Group B ◽  
Pituitary Macroadenomas

OBJECTIVEExtracapsular resection of pituitary microadenomas improves remission rates, but the application of pseudocapsular techniques for macroadenomas has not been well described. In larger tumors, the extremely thin, compressed normal gland or its complete absence along the tumor’s anterior surface limits the application of the traditional pseudocapsular technique that can be used for microadenomas. However, in the authors’ experience, the interface between the pseudocapsule at the posterior margin of the adenoma and the compressed normal gland behind it is universally present, providing a surgical dissection plane. In mid-2010, the authors began using a new surgical technique to identify and use this interface for the resection of larger macroadenomas, a technique that can be used with the microscope or the endoscope.METHODSThe authors performed a cohort study using prospectively collected preoperative imaging reports and operative details and retrospectively reviewed postoperative images and clinical follow-up of patients with a pituitary macroadenoma 20–40 mm in maximum diameter undergoing microscopic transsphenoidal resection. Since dissection of the tumor capsule only pertains to encapsulated tumor within the sella and not to tumor invading the cavernous sinus, assessment of tumor removal of noninvasive tumors emphasized the entire tumor, while that of invasive tumors emphasized the intrasellar component only. The incidence of residual tumor on postoperative imaging, new-onset endocrinopathy, and recovery of preoperative pituitary deficits was compared between patients who underwent surgery before (Group A) and after (Group B) implementation of the new technique.RESULTSThere were 34 consecutive patients in Group A and 74 consecutive patients in Group B. Tumors in 18 (53%) Group A and 40 (54%) Group B patients had no evidence of cavernous sinus invasion on MRI. Use of the posterior pseudocapsule technique reduced the incidence of intrasellar residual tumor on postoperative MRI for tumors without cavernous sinus invasion (39% [Group A] vs 10%, p < 0.05) and in all tumors regardless of invasion (50% vs 18%, p < 0.005). The incidence of new endocrinopathy was less likely (25% vs 12%, p = 0.098) and the recovery of prior deficits more likely (13% vs 27%, p = 0.199) among patients treated using the pseudocapsule approach, although the differences are not statistically significant.CONCLUSIONSUse of the posterior pseudocapsule dissection plane can enhance the resection of pituitary macroadenomas.

scholarly journals Texture analysis of CINE CMR image in healthy volunteers-preliminary results

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
P Tie ◽  
S.J Gandy ◽  
R.A Ross ◽  
J.G Houston
Keyword(s):  
Steady State ◽  
Texture Analysis ◽  
Coefficient Of Variation ◽  
Breath Hold ◽  
Funding Source ◽  
Gradient Echo ◽  
Mr Images ◽  
Older Volunteers ◽  
Cine Mr ◽  
Cine Cmr

Abstract Background Texture analysis (TA) is a technique that measures the MRI signal via pixel greyscale variations (figure 1), and may be useful in cardiac MR (CMR) for detecting features not visible to the human eye. Purpose To use TA to examine myocardial CINE MR Images in a cohort of volunteers. Major feature differences were anticipated between images at end diastole (ED) and end systole (ES), whilst minor differences were anticipated between younger and older volunteers. Methods Two cohorts (each n=30) were studied - young (44±3 years), and old (68±4 years). A 2D ECG-gated breath-hold segmented steady-state gradient echo sequence was used. Myocardial TA features were derived using MaZda v4.7. Measurements were made by two observers. Results A total of 39 TA features were significantly different between ED and ES (p&lt;0.05), and 9 features were significantly different between the young and old cohorts (p&lt;0.05). Finally, 15 of the original 50 TA features were repeatable (root mean squared coefficient of variation under 10%). Conclusion Selected TA features in CINE CMR are repeatable and can identify differences between major and minor texture changes. Funding Acknowledgement Type of funding source: Other. Main funding source(s): Medical Research Scotland, Guerbet Group

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