CT-guided computer-assisted stereotactic resection of brain tumours

1994 ◽  
Vol 131 (3-4) ◽  
pp. 274-281
Author(s):  
A. G. Melikian ◽  
M. I. Kazarnovskaya ◽  
A. V. Stock ◽  
A. V. Golanov ◽  
S. M. Ignatov ◽  
...  
Keyword(s):  
Brain Tumours ◽  
Computer Assisted ◽  
Ct Guided

scholarly journals Computer-Assisted Design Template Guided Percutaneous Radiofrequency Thermocoagulation through Foramen Rotundum for Treatment of Isolated V2 Trigeminal Neuralgia: A Retrospective Case-Control Study

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Ran Wang ◽  
Ying Han ◽  
Lijuan Lu
Keyword(s):  
Trigeminal Neuralgia ◽  
Control Group ◽  
Computer Assisted ◽  
Retrospective Case ◽  
Ct Guided ◽  
Computer Assisted Design ◽  
Radiofrequency Thermocoagulation ◽  
Significant Difference ◽  
Foramen Rotundum ◽  
Experimental Group

Objective. Radiofrequency thermocoagulation (RFT) through the foramen rotundum has emerged as an alternative for treatment of isolated V2 trigeminal neuralgia. But puncture of the foramen rotundum is difficult and time-consuming. In current study, we introduced the application of a computer-assisted design (CAD) template to guide foramen rotundum cannulation. Meanwhile, we assessed its safety and efficacy in the treatment of isolated V2 trigeminal neuralgia. Methods. From November 2015 to August 2017, thirty-eight patients with isolated V2 trigeminal neuralgia were treated with computed tomography- (CT-) guided RFT through the foramen rotundum in our institution. All cases were reviewed, and patients were divided into the experimental group (n=17, puncture with a CAD template) and control group (n=21, free-hand puncture) according to the puncture method used. The puncture times, duration of puncture, and duration of operation were collected. The outcome of pain remission was evaluated utilizing the Barrow Neurological Institute’s (BNI) pain score. Complications and recurrence of pain were also recorded. Data were compared between groups. Results. The rate of one-time successful puncture in the experimental group was obviously higher than that in the control group. Mean puncture times in the experimental group was fewer. Average duration of puncture and operation in the experimental group was also shorter than that in the control group. All patients experienced good pain remission (BNI Class I or II) postoperatively. At four follow-up points (7 days, 3 months, 6 months, and 12 months after operation), there was no significant difference in good pain relief rate between the two groups. Meanwhile, no significant difference was found in complications. Conclusions. CAD template is a safe and precise navigation instrument for RFT treatment of isolated V2 trigeminal neuralgia via the foramen rotundum. Therefore, this novel tool is worthy of clinical promotion.

scholarly journals Correlation of CT and MR with Impedance Monitoring and Histopathology in Stereotactic Biopsies

1990 ◽  
Vol 17 (2) ◽  
pp. 184-189 ◽  
Author(s):  
J. Gorecki ◽  
E.J. Dolan ◽  
R.R. Tasker ◽  
W. Kucharczyk
Keyword(s):  
Stereotactic Biopsy ◽  
Computer Assisted ◽  
Pathologic Examination ◽  
Resonance Imaging ◽  
Mr Images ◽  
Ct Guided ◽  
Computer Assisted Tomography ◽  
Radiologic Imaging ◽  
Impedance Monitoring ◽  
Stereotactic Biopsies

ABSTRACT:Magnetic Resonance Imaging (MR) and Computer Assisted Tomography (CT) guided stereotaxis combined with intraoperative impedance monitoring and multiple sequential biopsies provides the opportunity to correlate the results of radiologic imaging with impedance and histopathology. The authors present the methods used and preliminary results obtained from 30 stereotactic biopsies with complete correlation in 12 cases. Impedance changes correlate accurately with lesion margins as defined by histology. CT images of enhancing lesions correlate quite closely to the histopathologic lesion margins whereas the appearance of the lesion on MR images is often larger than subsequently identified by either impedance or at pathologic examination. Impedance monitoring is a useful adjunct to stereotactic biopsy as it helps to accurately define lesion margins and can help direct the choice of biopsy sites.

CT-guided and computer assisted stereotactic biopsy

1993 ◽  
Vol 125 (1-4) ◽  
pp. 142-149 ◽  
Author(s):  
J. Voges ◽  
R. Schr�der ◽  
H. Treuer ◽  
O. Pastyr ◽  
W. Schlegel ◽  
...  
Keyword(s):  
Stereotactic Biopsy ◽  
Computer Assisted ◽  
Ct Guided

Computer-Assisted CT-Guided Stereotactic Biopsy and Brachytherapy of Brain Tumors

1994 ◽  
Vol 63 (1-4) ◽  
pp. 52-55 ◽  
Author(s):  
R.Q. Quiñones-Molina ◽  
A. Alaminos ◽  
H. Molina ◽  
J. Muñoz ◽  
G. López ◽  
...  
Keyword(s):  
Brain Tumors ◽  
Stereotactic Biopsy ◽  
Computer Assisted ◽  
Ct Guided

Computer-assisted navigated resection of brain tumours

1997 ◽  
Vol 6 (5-6) ◽  
pp. 496-500
Author(s):  
M. Aichholzer ◽  
K. Ungersböck ◽  
K. Rössler ◽  
H. Görzer ◽  
W. T. Koos
Keyword(s):  
Brain Tumours ◽  
Computer Assisted

Computer Assisted Diagnosis of Brain Tumours in CT-Scan Imaging

1989 ◽  
pp. 423-429
Author(s):  
J. R. Iglesias ◽  
J. Esparza ◽  
K. Tönnsen ◽  
C. Aruffo ◽  
Ch. Brinnel ◽  
...  
Keyword(s):  
Ct Scan ◽  
Brain Tumours ◽  
Computer Assisted ◽  
Computer Assisted Diagnosis ◽  
Assisted Diagnosis

Computer-Assisted Navigation for Real Time Planning of Pedicle Subtraction Osteotomy in Cervico-Thoracic Deformity Correction

2018 ◽  
Vol 16 (4) ◽  
pp. 445-450 ◽  
Author(s):  
John H Shin ◽  
Vijay Yanamadala ◽  
Thomas D Cha
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Vertebral Body ◽  
Deformity Correction ◽  
Pedicle Subtraction Osteotomy ◽  
Computer Assisted ◽  
Advanced Technique ◽  
Ct Guided ◽  
Soft Tissue Dissection ◽  
Patient Consent

Abstract BACKGROUND Pedicle subtraction osteotomy (PSO) at the cervicothoracic junction (CTJ) is a powerful technique to correct severe kyphosis and sagittal malalignment. Reported techniques have demonstrated the safety and efficacy of the PSO, however limited visualization of surrounding tissues increases the potential for complications with this advanced technique. OBJECTIVE To describe the application of computed tomographic (CT)-based image guidance to the planning and execution of PSO at the CTJ. METHODS Intraoperative registration and verification of anatomic landmarks are performed with the intraoperative O-arm CT across the CTJ. With the navigation probe, the targeted pedicle is identified and the intended trajectories are rehearsed and saved on the navigational computer. As the PSO is performed, the navigation probe is used to check the depth, accuracy, and trajectory through each side. The extent of soft tissue dissection around the lateral aspect of the vertebral body through which the PSO is performed is also verified in real time. This technique was performed in 12 consecutive patients from 2013-2016. An IRB approved, retrospective analysis was performed from a prospective spinal deformity outcomes database. Patient consent is not required for publication as this report does not describe a specific case but rather a surgical technique used in practice. RESULTS There were no vascular, esophageal, or soft tissue injuries in 12 consecutive patients. There were no cases of paralysis. Two patients developed hand weakness days after surgery. Intraoperative O-arm CT performed after closure of the osteotomy confirmed the accuracy of the osteotomy planning with no breach of the anterior cortical wall of the osteotomized vertebral body. CONCLUSION CT-guided navigation allows for 3-dimensional visualization of the CTJ and minimizes complications associated with inadequate surgical visualization of vascular and deep organ structures.

scholarly journals Reduction of patient radiation dose during percutaneous CT vertebroplasty: Impact of a new computer-assisted navigation (CAN) system

2020 ◽  
Vol 55 (1) ◽  
pp. 11-16
Author(s):  
C. Teriitehau ◽  
H. Rabeh ◽  
E. Pessis ◽  
Q. Sénéchal ◽  
F. Besse ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Percutaneous Vertebroplasty ◽  
Control Group ◽  
Computer Assisted ◽  
Ct Guided ◽  
Assisted Navigation ◽  
Procedure Duration ◽  
Conventional Ct ◽  
The Impact ◽  
Patient Radiation Dose

To assess the impact of a computer assisted navigation system (CAN) (CT-Navigation™ IMACTIS, France) on patient radiation doses during percutaneous CT vertebroplasty a retrospective comparative trial was performed and included 37 patients requiring percutaneous vertebroplasty. This study was approved by CCN (Centre Cardiologique du Nord, Saint-Denis, France) ethical committee; all patients provided informed consent. All procedures were conducted in the interventional radiology department at CCN, by an experienced single radiologist using the same model and CT scan with identical parameters. The interventional dose length product (IDLP), representing the absorbed dose by the length of explored organs during the needle insertion phase, was compared in 15 consecutive patients who underwent a conventional procedure (CT control group), and in 22 patients who underwent CAN CT vertebroplasty (CAN group). The IDLP difference between the two groups was evaluated using Mann–Whitney U test. The median IDLP dose for the CAN group was 305.6 mGy.cm [182.3; 565.4], representing a reduction by a 3.2 factor compared with that of the conventional CT group (median 975.2 mGy.cm [568.3; 1077.1]; p < 0.001). The median procedure duration for the CAN group was 50 min [35; 60] vs. 100 min [82; 100] in the CT group (p < 0.001), representing a 50% reduction. In experienced hands, use of a CT-Navigation™ system (IMACTIS®) significantly reduced both patient radiation dose and procedure duration when compared to conventional CT guided percutaneous vertebroplasty.

3-D organization of fibrinogen receptors using computer reconstruction and whole-mount microscopy

1988 ◽  
Vol 46 ◽  
pp. 30-31
Author(s):  
E. T. O'Toole ◽  
R. R. Hantgan ◽  
J. C. Lewis
Keyword(s):  
Whole Blood ◽  
Colloidal Gold ◽  
Blood Platelets ◽  
Cell Contact ◽  
Computer Assisted ◽  
Adherent Cells ◽  
Differential Centrifugation ◽  
Computer Reconstruction ◽  
Sds Page ◽  
Whole Mount

Thrombocytes (TC), the avian equivalent of blood platelets, support hemostasis by aggregating at sites of injury. Studies in our lab suggested that fibrinogen (fib) is a requisite cofactor for TC aggregation but operates by an undefined mechanism. To study the interaction of fib with TC and to identify fib receptors on cells, fib was purified from pigeon plasma, conjugated to colloidal gold and used both to facilitate aggregation and as a receptor probe. Described is the application of computer assisted reconstruction and stereo whole mount microscopy to visualize the 3-D organization of fib receptors at sites of cell contact in TC aggregates and on adherent cells.Pigeon TC were obtained from citrated whole blood by differential centrifugation, washed with Ca++ free Hank's balanced salts containing 0.3% EDTA (pH 6.5) and resuspended in Ca++ free Hank's. Pigeon fib was isolated by precipitation with PEG-1000 and the purity assessed by SDS-PAGE. Fib was conjugated to 25nm colloidal gold by vortexing and the conjugates used as the ligand to identify fib receptors.

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