Interactive MR imaging-guided biopsy and aspiration with a modified clinical C-arm system.

Lewin, Jonathan S.; Petersilge, Cheryl A.; Hatem, Stephen F.; Duerk, Jeffrey L.; Lenz, G.; Clampitt, Mark; Williams, Michael L.; Kaczynski, Kyle; Lanzieri, Charles F.; Wise, Alexandria; Haaga, John R.

doi:10.2214/ajr.170.6.9609180

Cited by 133 publications

(68 citation statements)

References 25 publications

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“…Over the past few years, magnetic resonance imaging (MRI) has developed into a potent alternative modality for guiding such procedures with its superior soft tissue contrast, multiplanar imaging capabilities and lack of radiation burden. There are already numerous reports of different procedures, including abdominal biopsies, guided by MRI [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In the abdominal biopsies the emphasis has been mainly on liver lesions.…”

Section: Introductionmentioning

confidence: 99%

MRI-guided abdominal biopsy in a 0.23-T open-configuration MRI system

et al. 2004

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The purpose of this study was to test the hypothesis that when ultrasound (US) guidance is not feasible, abdominal biopsies can be performed safely and accurately under magnetic resonance imaging (MRI) guidance in a low-field environment. MRI-guided abdominal biopsy was performed on 31 consecutive patients, in whom US-guided abdominal biopsy was not possible because the lesion was not visualized in US (n=27) or an US-guided procedure was not considered safe (n=4). The locations of the lesions were liver (n=14), pancreas (n=6), lymph node (n=4), retroperitoneal mass (n=3), adrenal gland (n=3) and spleen (n=1). The average size of the lesion was 2.2 cm (range 1-4 cm) in maximum diameter. All procedures were done by using a 0.23-T open-configuration C-arm-shaped MRI scanner with interventional optical tracking equipment and software. Fine-needle aspiration (FNA) biopsy was performed on all 31 patients; 18 patients underwent both FNA biopsy and cutting needle core biopsy. Procedures were evaluated for diagnostic sensitivity, specificity and accuracy as well as procedure time and complications. The FNA biopsy specimens were adequate for interpretation in 27 (87%) of 31 cases. Two of these proved to be false-negative findings during follow-up or subsequent biopsy. The final diagnosis was malignant in 15 and benign in 16 patients. The sensitivity, specificity and accuracy of FNA biopsy were 71, 100 and 81%, respectively. Of the 18 core-needle biopsies, one was determined false-negative owing to nonrepresentativeness. The sensitivity, specificity and accuracy of histological samples were 90, 100 and 94%, respectively. The needle time was 19 min on average and the mean room time was 1 h 48 min. No immediate or late complications occurred. MRI-guided abdominal biopsy can be performed safely and accurately in a low-field environment in patients for whom an US-guided procedure is not feasible.

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Section: Introductionmentioning

confidence: 99%

MRI-guided abdominal biopsy in a 0.23-T open-configuration MRI system

et al. 2004

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“…For procedures performed on the C-shaped 0.2 Tesla MR imaging system (Magnetom Concerto) [24], a flexible ringshaped radio frequency body coil with 35 cm diameter was used. The needle path was planned on axial T1-weighted spin echo MR images (Fig.…”

Section: Mr Guided Sacroiliac Joint Injectionmentioning

confidence: 99%

Evaluation of MR imaging guided steroid injection of the sacroiliac joints for the treatment of children with refractory enthesitis-related arthritis

et al. 2010

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“…MR images provide three essential functions: (1) anatomical image guidance for placement of the HIFU probe, (2) real-time temperature monitoring using proton resonance frequency shift to target the location and duration of the therapy [19]- [21], and (3) post-process functional assessment to evaluate the degree of tissue necrosis [22]. The second function, temperature monitoring, is critical because local perfusion is variable and cannot be predicted [23].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of MR-temperature mapping of ultrasonic heating from a CMUT

Wong

Watkins

Kupnik

et al. 2008

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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In the last decade, high intensity focused ultrasound (HIFU) has gained popularity as a minimallyinvasive and non-invasive therapeutic tool for treatment of cancers, arrhythmias, and other medical conditions. HIFU therapy is often guided by magnetic resonance imaging (MRI), which provides anatomical images for therapeutic device placement, temperature maps for treatment guidance, and post-operative evaluation of the region of interest. While piezoelectric transducers are dominantly used for MR-guided HIFU, capacitive micromachined ultrasonic transducers (CMUTs) show competitive advantages such as ease of fabrication, integration with electronics, improved efficiency, and reduction of self-heating. In this paper, we will show our first results of an unfocused CMUT transducer monitored by MR-temperature maps. This 2.51 mm by 2.32 mm, unfocused CMUT heated a HIFU phantom by 14°C in 2.5 min. This temperature rise was successfully monitored by MR thermometry in a 3.0 T General Electric scanner. Index Terms

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Interactive MR imaging-guided biopsy and aspiration with a modified clinical C-arm system.

Cited by 133 publications

References 25 publications

MRI-guided abdominal biopsy in a 0.23-T open-configuration MRI system

MRI-guided abdominal biopsy in a 0.23-T open-configuration MRI system

Evaluation of MR imaging guided steroid injection of the sacroiliac joints for the treatment of children with refractory enthesitis-related arthritis

Feasibility of MR-temperature mapping of ultrasonic heating from a CMUT

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