New coil concept for endoluminal MR imaging

Heye, Tobias; Kuntz, C.; Düx, Marcus; Encke, Jens; Palmowski, Moritz; Autschbach, Frank; Volke, F.; Kauffmann, G. W.; Grenacher, Lars

doi:10.1007/s00330-006-0318-y

Cited by 20 publications

(3 citation statements)

References 37 publications

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“…The use of both an external and endoluminal coil has been previously advocated to improve staging of perioesophageal lymph nodes which may be beyond the imaging range of the endoluminal probe [5]. A recent ex vivo study assessing the local staging of gastric carcinoma using an endoluminal technique shows promise by employing a folding, self-expanding 8-cm diameter receiver coil, again to improve the imaging range whilst maintaining high spatial resolution [12].…”

Section: Discussionmentioning

confidence: 97%

The appearances of oesophageal carcinoma demonstrated on high-resolution, T2-weighted MRI, with histopathological correlation

et al. 2006

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This paper describes the spectrum of imaging features of oesophageal adenocarcinoma seen using high-resolution T2-weighted (T2W) magnetic resonance imaging (MRI). Thirty-nine patients with biopsy-proven oesophageal adenocarcinoma were scanned using an external surface coil. A sagittal T2W sequence was used to localise the tumour and to plan axial images perpendicular to the tumour. Fast spin-echo (FSE) T2W axial sequence parameters were: TR/TE, 3,300-5,000 ms/120-80 ms; field of view (FOV) 225 mm, matrix 176x512(reconstructed) mm to 256x224 mm, giving an in-plane resolution of between 1.28x0.44 mm and 0.88x1.00 mm, with 3-mm slice thickness. Thirty-three patients underwent resection and the MR images were compared with the histological whole-mount sections. There were four T1, 12 T2, and 17 T3 tumours. The T2W high-resolution MRI sequences produced detailed images of the oesophageal wall and surrounding structures. Analysis of the imaging appearances for different tumour T stages enabled the development of imaging criteria for local staging of oesophageal cancer using high-resolution MRI. Our study illustrates the spectrum of appearances of oesophageal cancer on T2W high-resolution MRI, and using the criteria established in this study, demonstrates the potential of this technique as an alternative non-invasive method for local staging for oesophageal cancer.

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Section: Discussionmentioning

confidence: 97%

The appearances of oesophageal carcinoma demonstrated on high-resolution, T2-weighted MRI, with histopathological correlation

et al. 2006

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“…One of the shortcomings of this study was that the diagnosis of postoperative abdominal lymph node metastasis was dependent on regular abdominal enhanced CT, MRI, and PET-CT imaging. However, CT diagnosis of abdominal lymph nodes has an overall accuracy of 62–64% [ 18 ] and MRI has sensitivity of 71% ± 18.22, specificity of 29% ± 18.07, and accuracy of 58% ± 19.72 in this regard [ 19 ]. PET/CT for diagnosis of abdominal LN metastasis has the sensitivity, specificity, positive predictive value (PPV) and negative predictive value of FDG of 40%, 95%, 91% and 56%, respectively [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

Patterns and rates of abdominal lymphatic metastasis following esophageal carcinoma

et al. 2017

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AimTo determine the rate of abdominal lymph node metastasis after radical surgery for esophageal cancer and define the radiotherapy target area.MethodsOf the 1593 patients who underwent R0 radical esophagectomy for thoracic esophageal squamous cell carcinoma (TE-SCC), 148 developed abdominal lymph node (LN) metastases within three years of surgery. During that time interval, patients were examined by various imaging methods (enhanced computer tomography, magnetic resonance imaging, and positron emission tomography–CT) at set time points. The emerging recurrence pattern, preferred sites for abdominal metastasis, and correlation with added clinical factors were carefully recorded, to permit for delineation of a target area for radiotherapy.ResultsWe found postoperative metastatic abdominal LNs in 9.3% of the patients treated for esophageal cancer. Lesions in the upper, middle, and lower esophageal segments metastasized to abdominal LNs at 2.3%, 7.8%, and 26.6% (P < 0.0001), respectively. Of all cases, 4.8% had fewer than two affected LNs, while 20.1% had more than three metastatic LNs (P< 0.0001). The metastasis rates of negative and positive celiac LNs were 4.6% and 22.7%, respectively. Abdominal LN metastasis rates for the following LNs: 16a2 and 16a1 of para-aortic, celiac artery, posterior surface of the pancreatic head and common hepatic artery were 64.9%, 41.2%, 37.8%, 32.4%, and 20.9%, respectively. The overall rate of metastasis to these groups of LNs was 91.9%.ConclusionThis study determined that stations 16a1 and 16a2 of the para-aortic, truncus coeliacus, posterior surface of the pancreatic head, and arteria hepatica communis lymph nodes were the preferred sites for abdominal LN metastasis, thus defining target areas for postoperative radiotherapy.

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“…As the coaxial cable will also be inserted inside the patient's body it could burn tissues. To overcome this problem, promising preliminary studies have demonstrated the potential of optical fibers to transmit and receive RF signals to prevent burns …”

Section: Discussionmentioning

confidence: 99%

In vivo MRS for the assessment of mouse colon using a dedicated endorectal coil: initial findings

et al. 2017

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Inflammatory bowel disease is a common group of inflammation conditions that can affect the colon and the rectum. These pathologies require a careful follow-up of patients to prevent the development of colorectal cancer. Currently, conventional endoscopy is used to depict alterations of the intestinal walls, and biopsies are performed on suspicious lesions for further analysis (histology). MRS enables the in vivo analysis of biochemical content of tissues (i.e. without removing any samples). Combined with dedicated endorectal coils (ERCs), MRS provides new ways of characterizing alterations of tissues. An MRS in vivo protocol was specifically set up on healthy mice and on mice chemically treated to induce colitis. Acquisitions were performed on a 4.7 T system using a linear volume birdcage coil for the transmission of the B magnetic field, and a dedicated ERC was used for signal reception. Colon-wall complex, lumen and visceral fat were assessed on healthy and treated mice with voxel sizes ranging from 0.125 μL to 2 μL while keeping acquisition times below 3 min. The acquired spectra show various biochemical contents such as α- and β-methylene but also glycerol backbone and diacyl. Choline was detected in tumoral regions. Visceral fat regions display a high lipid content with no water, whereas colon-wall complex exhibits both high lipid and high water contents. To the best of our knowledge, this is the first time that in vivo MRS using an ERC has been performed in the assessment of colon walls and surrounding structures. It provides keys for the in vivo characterization of small local suspicious lesions and offers complementary solutions to biopsies.

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New coil concept for endoluminal MR imaging

Cited by 20 publications

References 37 publications

The appearances of oesophageal carcinoma demonstrated on high-resolution, T2-weighted MRI, with histopathological correlation

The appearances of oesophageal carcinoma demonstrated on high-resolution, T2-weighted MRI, with histopathological correlation

Patterns and rates of abdominal lymphatic metastasis following esophageal carcinoma

In vivo MRS for the assessment of mouse colon using a dedicated endorectal coil: initial findings

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