Interventional and intraoperative MR: review and update of techniques and clinical experience

Schulz, Thomas; Puccini, Silvia; Schneider, J. P.; Kahn, Thomas

doi:10.1007/s00330-004-2496-9

Cited by 52 publications

(29 citation statements)

References 146 publications

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“…In the last few years the speed of MR imaging has been drastically increased and the design of magnets has been modified, so that MR-guided interventions in different organs can now be performed [4,5,12,13,20]. The multiplanar imaging capability reflects the most advantageous feature of MR imaging compared with CT or even US.…”

Section: Discussionmentioning

confidence: 98%

“…Therefore, image-guided percutaneous interventional procedures are increasing in popularity due to their less invasive nature, lower risk, high diagnostic accuracy and cost reduction compared with surgery. For these reasons the number of image-guided percutaneous interventional procedures has markedly increased during the last two decades [3,4]. MR-guided interventions provide sufficient sensitivity for the detection of liver or abdominal lesions or tumors of the musculoskeletal system and good visualization of the puncture needle during the biopsy without exposing the patient and the medical team to ionizing radiation [5].…”

Section: Introductionmentioning

confidence: 99%

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MR-guided biopsies of lesions in the retroperitoneal space: technique and results

et al. 2005

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The purpose of this study was to evaluate the safety and precision of MRI-guided biopsies of retroperitoneal space-occupying tumors in an open low-field system. In 30 patients with indistinct retroperitoneal tumors [paraaortic lesion (n=20), kidney (n=2), suprarenal gland (n=3) and pancreas (n=5)] MR-guided biopsies were performed using a low-field system (0.2 T, Magnetom Concerto, Siemens, Germany). For the monitoring of the biopsies T1-weighted FLASH sequences (TR/TE=160/5 ms; 90 degrees ) were used in all patients and modified FLASH sequences (TR/TE=160/13 ms; 90 degrees ) in ten patients. After positioning of the needle in the tumors 114 biopsy specimens were acquired in coaxial technique with 16-gauge cutting needles (Somatex, Germany). The biopsies were successfully performed in all patients without vascular or organ injuries. The visualization of the aortic blood flow with MRI facilitated the biopsy procedures of paraaortic lesions. The size of the lesions ranged from 1.6 to 7.5 cm. The median distance of the biopsy access path was 10.4 cm. Adequate specimens were obtained in 28 cases (93.3%) resulting in a correct histological classification of 27 lesions (90%). In conclusion, MR-guided biopsies of retroperitoneal lesions using an open low-field system can be performed safely and accurately and is an alternative to CT-guided biopsies.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

MR-guided biopsies of lesions in the retroperitoneal space: technique and results

et al. 2005

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“…Interventional MR imaging is advantageous due to the use of non-ionizing radiation and multiplanar imaging capabilities [6][7][8]. Various spine interventions have been successfully performed at open MR scanners [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Real-time MR fluoroscopy-navigated lumbar facet joint injections: feasibility and technical properties

et al. 2008

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We prospectively evaluated the feasibility and technical properties of a dedicated interventional magnetic resonance (MR) imaging protocol for near-real-time MR fluoroscopy-guided bilateral lumbar facet joint injections. A total of 44 facet joint injections were performed in 22 patients using a C-shaped open 0.2-T MR imaging system (Magnetom Concerto, Siemens Medical Solutions, Erlangen, Germany). A T1/T2-weighted fast-imaging-with-steady-precession (FISP) sequence with an end-to-end latency of 1.2 s facilitated sufficient near real-time MR imaging guidance in all cases. A T1-weighted two dimensional fast-low-angle-shot (FLASH2D) MR sequence identified final needle tip location. Different angles of the needle path had only minimal influence on the appearance of the needle artifact produced by both sequences, resulting in a symmetrical needle tip artifact. The joint cavity was successfully punctured in 79.5% (35/44) of joints, which was followed by intra-articular fluid accumulation in 75% (33/44). Inaccessible joints demonstrated a significantly (p=0.044) higher number of posterior osteophytes (66.7%, 6/9 joints) compared to accessible joints (26%, 9/35 joints). No complications occurred. Table time showed significant shortening over time with average table time of 33 (21-68.5) min. We conclude that MR fluoroscopy-navigated lumbar facet joint injections are feasible and safe.

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“…While there is an extensive body of literature on the factors affecting cryosurgery success (with the lethal temperature threshold of −45°C as possibly the most commonly accepted factor in recent years (Gage and Baust 1998)), it is the match between the frozen region contour and the outer surface of the target region which is currently used for cryosurgery control. This match is evaluated with the application of an imaging device such as ultrasound or MRI (Onik et al , 1985Rubinsky et al 1993;Schulz et al 2004). The cryoprobe layout is a key factor for achieving the highest quality of that match and, therefore, for the success of cryosurgery.…”

Section: Introductionmentioning

confidence: 99%

Experimental verification of numerical simulations of cryosurgery with application to computerized planning

Rossi¹,

Rabin²

2007

Phys. Med. Biol.

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As a part of an ongoing effort to develop computerized planning tools for cryosurgery, an experimental study has been conducted to verify a recently developed numerical technique for bioheat transfer simulations. Experiments were performed on gelatin solution as a phantom material, using proprietary liquid-nitrogen cryoprobes. Urethral warming was simulated with the application of a cryoheater, which is a proprietary temperature-controlled electrical heater. The experimental design was aimed at creating a 2D heat-transfer problem. Analysis of experimental results was based on reconstruction of the frozen region from video recordings, using a region-growing segmentation algorithm. Results of this study show an average disagreement of 2.9% in the size of the frozen region, between experimental data and numerical simulation of the same experiment, which validates both the recently developed algorithm for numerical simulations and the newly developed algorithm for segmentation from video recordings.

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Interventional and intraoperative MR: review and update of techniques and clinical experience

Cited by 52 publications

References 146 publications

MR-guided biopsies of lesions in the retroperitoneal space: technique and results

MR-guided biopsies of lesions in the retroperitoneal space: technique and results

Real-time MR fluoroscopy-navigated lumbar facet joint injections: feasibility and technical properties

Experimental verification of numerical simulations of cryosurgery with application to computerized planning

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