In vitro evaluation of a novel fiducial marker for computed tomography and magnetic resonance imaging of soft tissues in small animals

Terry, Jesse; Milovancev, Milan; Nemanic, Sarah

doi:10.2460/ajvr.75.11.974

Cited by 11 publications

(11 citation statements)

References 36 publications

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“…Cats were monitored under general anesthesia via noninvasive blood pressure, ECG, end‐tidal carbon dioxide, and pulse oximetry. A previously described triangular, fiducial marker that is detected on CTA and MRI was sutured to the skin over the center of the FISS (Figs and ) . All markers were the same size and had a small crimp in 1 side to provide polarity.…”

Section: Methodsmentioning

confidence: 99%

Microscopic Evaluation of Peritumoral Lesions of Feline Injection Site Sarcomas Identified by Magnetic Resonance Imaging and Computed Tomography

et al. 2016

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Section: Methodsmentioning

confidence: 99%

Microscopic Evaluation of Peritumoral Lesions of Feline Injection Site Sarcomas Identified by Magnetic Resonance Imaging and Computed Tomography

et al. 2016

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“…The mean attenuation value within the region of interest was recorded both pre‐ and postcontrast administration; the difference between these two values was used to determine the amount of contrast enhancement for each lymph node. The standard deviation of the attenuation value for all voxels within the ROI on both pre‐ and postcontrast administration images was used as an objective measure of heterogeneity . Analysis was performed on the average of five attenuation and heterogeneity measurements of each lymph node.…”

Section: Methodsmentioning

confidence: 99%

Combination of Computed Tomographic Imaging Characteristics of Medial Retropharyngeal Lymph Nodes and Nasal Passages Aids Discrimination Between Rhinitis and Neoplasia in Cats

Nemanic

Hollars

Nelson

et al. 2015

Vet Radiology Ultrasound

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Feline nasal diseases are a diagnostic challenge. The objective of this retrospective, cross-sectional study was to determine whether computed tomography (CT) imaging characteristics of the medial retropharyngeal lymph nodes (MRPLN), alone or in combination with CT imaging characteristics of the nasal passages, could aid in differentiation between rhinitis and nasal neoplasia. Cats were recruited from record archives at two veterinary facilities during the period of 2008-2012. Selection criteria were presentation for chronic nasal discharge, contrast-enhanced CT of the head that included the MRPLN, and rhinoscopic nasal biopsy resulting in diagnosis of rhinitis or neoplasia. For each CT scan, two board-certified veterinary radiologists recorded MRPLN size, attenuation, heterogeneity, contrast-medium enhancement, margination, shape, presence of a lymph node hilus, perinodal fat, turbinate lysis, paranasal bone lysis, and nasal mass. Both readers were unaware of patient information at the time of CT interpretation. Thirty-four cats with rhinitis and 22 cats with neoplasia were included. Computed tomographic characteristics significantly associated with neoplasia included abnormal MRPLN hilus (OR 5.1), paranasal bone lysis (OR 5.6), turbinate lysis (5.6), mass (OR 26.1), MRPLN height asymmetry (OR 4.5), and decreased MRPLN precontrast heterogeneity (OR 7.0). The combined features predictive of neoplasia were a nasal mass with abnormal hilus (OR 47.7); lysis of turbinates/paranasal bones with abnormal MRPLN hilus (OR 16.2). Findings supported the hypothesis that combining CT features of the nasal passages and MRPLN aided in differentiating rhinitis from neoplasia in cats.

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“…The study design of this investigation was based previously published studies in which a Diplomate of the American College of Veterinary Radiology board‐certified radiologist (S.N.) and a Diplomate of the American College of Veterinary Surgery board‐certified surgeon (M.M.)…”

Section: Methodsmentioning

confidence: 99%

“…Anesthetic protocols were determined by the OSU‐VTH Anesthesia Service Anesthesia Service. At the mass site a fiducial marker was affixed to the skin surface for spatial orientation of the mass between imaging, surgery and pathology and for targeted histopathology of peritumoral projections …”

Section: Methodsmentioning

confidence: 99%

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CT angiography and MRI imaging features do not predict the tumor type and grade of feline injection site sarcoma

Fleming

Nemanic²,

Löhr

et al. 2019

Vet Radiology Ultrasound

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Computed tomographic angiography (CTA) and magnetic resonance imaging (MRI) have been described as methods for preoperative surgical planning in cats with feline injection site sarcomas (FISS), however, few published studies have compared these modalities. The objective of this retrospective, secondary analysis study was to determine if imaging features of FISS on CTA and MRI are predictive of neoplastic peritumoral projections. Archived data from a previous prospective study were retrieved for 10 cats with FISS. All cats had been evaluated in a single anesthetic episode with MRI and dual phase CT (CTA) imaging followed by surgical removal. Histopathological grading and targeted histopathology of imaging‐identified peritumoral projections were performed. Two observers evaluated the CTA and MRI studies for FISS shape, margination, size, enhancement pattern, postcontrast uniformity, pre‐ and postcontrast margination, the number of muscles involved, mass mineralization, and bone lysis. Metal was present in the imaging field of three of 10 cats, resulting in one nondiagnostic MRI. Peritumoral projections were detected in all cats with both imaging modalities, and most were benign. At least one neoplastic peritumoral projection was detected in six cats using MRI, five cats using CTA, and three cats with both modalities. Higher grade FISS were larger than low grade using MRI, and FISS were larger using MRI. Other FISS imaging features using MRI and CTA were similar. Findings supported use of either MRI or CTA for detecting neoplastic peritumoral projections in cats with FISS. Authors recommend CTA for cats with known metallic objects in the scan field.

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In vitro evaluation of a novel fiducial marker for computed tomography and magnetic resonance imaging of soft tissues in small animals

Abstract: A marker containing a 10% solution of iodinated contrast medium mixed with water provided ideal contrast for both CT and MRI.

Cited by 11 publications

References 36 publications

Microscopic Evaluation of Peritumoral Lesions of Feline Injection Site Sarcomas Identified by Magnetic Resonance Imaging and Computed Tomography

Microscopic Evaluation of Peritumoral Lesions of Feline Injection Site Sarcomas Identified by Magnetic Resonance Imaging and Computed Tomography

Combination of Computed Tomographic Imaging Characteristics of Medial Retropharyngeal Lymph Nodes and Nasal Passages Aids Discrimination Between Rhinitis and Neoplasia in Cats

CT angiography and MRI imaging features do not predict the tumor type and grade of feline injection site sarcoma

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