scholarly journals Agreement of Magnetic Resonance Imaging With Computed Tomography in the Assessment for Acute Skull Fractures in a Canine and Feline Cadaver Model

2021 ◽  
Vol 8 ◽  
Author(s):  
Silke Hecht ◽  
Kimberly M. Anderson ◽  
Aude Castel ◽  
John F. Griffin ◽  
Adrien-Maxence Hespel ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Head Trauma ◽  
Imaging Modality ◽  
Small Animal ◽  
Skull Fractures ◽  
Resonance Imaging ◽  
Significant Difference ◽  
Mri Sequences

Computed tomography (CT) is the imaging modality of choice to evaluate patients with acute head trauma. However, magnetic resonance imaging (MRI) may be chosen in select cases. The objectives of this study were to evaluate the agreement of MRI with CT in the assessment for presence or absence of acute skull fractures in a canine and feline cadaver model, compare seven different MRI sequences (T1-W, T2-W, T2-FLAIR, PD-W, T2*-W, “SPACE” and “VIBE”), and determine agreement of four different MRI readers with CT data. Pre- and post-trauma CT and MRI studies were performed on 10 canine and 10 feline cadaver heads. Agreement of MRI with CT as to presence or absence of a fracture was determined for 26 individual osseous structures and four anatomic regions (cranium, face, skull base, temporomandibular joint). Overall, there was 93.5% agreement in assessing a fracture as present or absent between MRI and CT, with a significant difference between the pre and post trauma studies (99.4 vs. 87.6%; p < 0.0001; OR 0.042; 95% CI 0.034–0.052). There was no significant difference between dogs and cats. The agreement for the different MRI sequences with CT ranged from 92.6% (T2*-W) to 94.4% (PD-W). There was higher agreement of MRI with CT in the evaluation for fractures of the face than other anatomic regions. Agreement with CT for individual MRI readers ranged from 92.6 to 94.7%. A PD-W sequence should be added to the MR protocol when evaluating the small animal head trauma patient.

Detection of Wooden Foreign Bodies in Muscle Tissue: Experimental Comparison of Computed Tomography, Magnetic Resonance Imaging, and Ultrasonography

1994 ◽  
Vol 15 (8) ◽  
pp. 437-443 ◽  
Author(s):  
Mark S. Mizel ◽  
Neil D. Steinmetz ◽  
Elly Trepman
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Muscle Tissue ◽  
Foreign Bodies ◽  
Imaging Modality ◽  
Experimental Comparison ◽  
Imaging Method ◽  
Resonance Imaging ◽  
Ct And Mri

An experimental study was performed to compare computed tomography (CT), magnetic resonance imaging (MRI), and real-time, high resolution ultrasonography (US) for the detection of wooden foreign bodies in muscle tissue. Wooden splinters were prepared, measured for size, soaked in saline, and placed in porcine muscle distant from and adjacent to bone. The specimens were then examined using roentgenography, CT and MRI in planes parallel and perpendicular to the splinters, and US. The largest wooden foreign bodies (minimum smallest width = 10 mm) were easily detected by CT, MRI, and US. Almost all splinters of various sizes, small and large, soaked in saline for 5 months were easily detected by MRI. Smaller splinters (minimum smallest width = 1–4 mm) soaked for only 3 days and placed distant from bone were most easily detected by US; those soaked for 5 months were most easily detected by either US or MRI. The smaller splinters soaked for only 3 days and placed near bone were not reliably detected by any of the imaging methods; CT and MRI were both more sensitive than US in this situation. MRI scanning was more sensitive perpendicular than parallel to the long axis of the splinters. Therefore, either US or MRI may be the best initial imaging modality for evaluation of a suspected wooden foreign body, depending on availability of imaging method, chronicity of symptoms, and proximity to bone.

Computed tomography and/or magnetic resonance imaging for pre-operative planning for inverted nasal papilloma: review of evidence

2009 ◽  
Vol 123 (7) ◽  
pp. 705-709 ◽  
Author(s):  
P D Karkos ◽  
L C Khoo ◽  
S C Leong ◽  
H Lewis-Jones ◽  
A C Swift
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Imaging Modality ◽  
Inverted Papilloma ◽  
Resonance Imaging ◽  
Recurrent Tumour ◽  
Computed Tomography Scanning ◽  
Operative Planning ◽  
Inverted Nasal Papilloma

AbstractBackground:Inverted nasal papilloma is a benign tumour with variable biological behaviour. It is a unique neoplasm and is often difficult to manage, being characterised by a tendency to recur following excision, an association with malignancy and an ability to destroy bone. Radiological diagnosis has traditionally been based on computed tomography, but it is often impossible to differentiate between polyps with entrapped debris and inverted nasal papilloma. Magnetic resonance imaging, especially T2-weighted images, is perhaps a better tool in differentiating inverted nasal papilloma from other nasal lesions, and has recently been advocated as the imaging modality of choice.Aims:To review the evidence on the ideal imaging modality for pre-operative planning of surgery for patients with histologically proven inverted nasal papilloma.Materials and methods:A systematic review of studies was undertaken, focusing on radiological assessment of inverted nasal papilloma (primary and recurrent). All English language articles were potentially included in the review. However, we excluded single case reports, case series, pictorial essays, ‘teaching’ reviews and reviews of inverted nasal papilloma not focusing on pre-operative imaging.Results:Sixteen studies were identified based on our search strategy. Only 10 fulfilled our criteria. Computed tomography scanning was the standard imaging modality of choice for assessing sinus involvement of inverted papilloma and for planning the extent of surgery. T2-weighted magnetic resonance imaging scans were able to distinguish tumour (intermediate signal) from inflammatory tissues (bright signal), but not post-operative scarring from recurrent tumour. No studies were found which compared the specificity and sensitivity of magnetic resonance imaging and computed tomography in the accurate pre-operative identification of the extent of inverted papilloma.Conclusions:There is currently not enough evidence to suggest one sole modality as providing optimum imaging for inverted nasal papilloma. Computed tomography remains the imaging modality of first choice for inverted nasal papilloma, despite certain disadvantages. Magnetic resonance imaging is able to distinguish tumour from inflammation and is advocated as a better tool for recurrent tumour, but bone destruction of sinus walls is less easy to recognise, compared with computed tomography. Evaluation of sinus tumours usually involves both imaging modalities, and inverted nasal papilloma should be included within this pathological group. The cohort of patients is usually small, so cost-effectiveness should not generally be an issue when considering whether to use computed tomography, magnetic resonance imaging or both. A well structured, prospective study is needed to evaluate the efficacy of magnetic resonance imaging versus computed tomography for pre-operative planning of histologically proven inverted nasal papilloma.

scholarly journals Imaging in multiple myeloma: How? When?

Blood ◽  
2019 ◽  
Vol 133 (7) ◽  
pp. 644-651 ◽  
Author(s):  
Elena Zamagni ◽  
Paola Tacchetti ◽  
Michele Cavo
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Multiple Myeloma ◽  
Magnetic Resonance ◽  
Imaging Modality ◽  
Response To Therapy ◽  
Whole Body ◽  
Bone Lesions ◽  
Resonance Imaging ◽  
Pet Ct

Abstract Bone disease is the most frequent feature of multiple myeloma (MM) and represents a marker of end-organ damage; it is used to establish the diagnosis and to dictate the immediate need for therapy. For this reason, imaging plays a significant role in the management of MM patients. Although conventional radiography has traditionally been the standard imaging modality, its low sensitivity in detecting osteolytic lesions and inability to evaluate response to therapy has called for the use of more sophisticated techniques, such as whole-body low-dose computed tomography (WBLDCT), whole-body magnetic resonance imaging, and 18F-fluorodeoxyglucose–positron emission tomography/computed tomography (PET/CT). In this review, the advantages, indications of use, and applications of the 3 techniques in the management of patients with MM in different settings will be discussed. The European Myeloma Network and the European Society for Medical Oncology guidelines have recommended WBLDCT as the imaging modality of choice for the initial assessment of MM-related lytic bone lesions. Magnetic resonance imaging is the gold-standard imaging modality for detection of bone marrow involvement, whereas PET/CT provides valuable prognostic data and is the preferred technique for assessment of response to therapy. Standardization of most of the techniques is ongoing.

Diagnostic modalities for distal radioulnar joint

2016 ◽  
Vol 42 (4) ◽  
pp. 395-404 ◽  
Author(s):  
S. Jens ◽  
T. Luijkx ◽  
F. F. Smithuis ◽  
M. Maas
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Imaging Modality ◽  
Conventional Radiography ◽  
Distal Radioulnar Joint ◽  
Resonance Imaging ◽  
Radioulnar Joint ◽  
Joint Pathology ◽  
Imaging Characteristics

The first imaging modality in patients suspected of distal radioulnar joint pathology should be conventional radiography to exclude or diagnose wrist pathology including osteoarthritis, rheumatoid arthritis, calcium pyrophosphate deposition disease, (healed) fractures, or impaction syndromes. When conventional radiography is inconclusive, high resolution 3 Tesla magnetic resonance imaging is advised. We provide a broad overview of the literature regarding the use of intra-articular contrast both with computed tomography (CTA) or magnetic resonance imaging (MRA). Conventional arthrography and unenhanced computed tomography are not indicated. This article discusses the most useful imaging techniques in terms of clinical indications, patient positioning, technical imaging requirements, and diagnostic performance in patients with suspected distal radioulnar joint pathology. Furthermore, the most prevalent pathologies are discussed, with the focus on imaging characteristics in both stable and unstable distal radioulnar joints.

scholarly journals Uterine Lipoleiomyoma: A Report of Two Cases

2017 ◽  
Vol 7 ◽  
pp. 26 ◽  
Author(s):  
Haji Mohammed Nazir ◽  
Sankesh Mehta ◽  
CR Seena ◽  
N Kulasekaran
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Abdominal Pain ◽  
Magnetic Resonance ◽  
Postmenopausal Women ◽  
Crucial Role ◽  
Imaging Modality ◽  
Lower Abdominal Pain ◽  
Resonance Imaging ◽  
Pelvic Tumors

We report two cases of uterine lipoleiomyoma in postmenopausal women of ages 52 and 55 years, who presented with complaints of leukorrhea and lower abdominal pain, respectively. Lipoleiomyoma is a rare benign variant of leiomyoma, having an incidence of 0.03%–0.2%. These are benign pelvic tumors which are usually asymptomatic and commonly occur in obese postmenopausal women. However, they can occasionally present with typical leiomyoma symptoms. Imaging plays a crucial role in the diagnosis of benign pelvic tumors. Ultrasonography is the first imaging modality for diagnosis of pelvic tumors in females. Computed tomography and magnetic resonance imaging are specific in demonstrating the uterine origin and fat component.

scholarly journals Musculoskeletal ultrasonography of the elbow joint in dogs: applicability and evaluation protocol

2019 ◽  
Vol 39 (6) ◽  
pp. 419-428
Author(s):  
Gabriela M.C. Bellegard ◽  
Érika R. Lopes ◽  
Shayne P. Bisetto ◽  
Maria Cristina F.N.S. Hage
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Elbow Joint ◽  
Small Animal ◽  
Resonance Imaging ◽  
Evaluation Protocol ◽  
Animal Medicine ◽  
Musculoskeletal Ultrasonography ◽  
Complex Joint

ABSTRACT: The elbow is a complex joint and has great clinical relevance in small animal medicine. Previous research in this area has been performed using radiographic and tomographic methods; however, there are limited studies on ultrasonography. The aims of this study was suggesting an evaluation protocol for elbow scan and describe the ultrasonographic anatomy of the elbow joint in dogs. Ten cross-breed dogs weighing 5-15kg underwent radiography and were selected for this ultrasonographic study. The protocol was established for the ultrasonographic description dividing the articular areas in the proximal, middle, and distal, lateral, cranial, medial, and caudal faces. The approach was performed in the longitudinal, transverse and oblique planes and the musculoskeletal structures were described according to the architecture, echogenicity and echotexture. Computed tomography and magnetic resonance imaging scans were obtained for one animal for comparison. Ultrasonography was effective in visualizing and analyzing muscles, tendons and ligaments. Bone contours and regions that have clinical significance such as the medial coronoid process and anconeus process were identified, but with limited access. Prior knowledge of the normal sonographic anatomy of the elbow joint, as well as its technical advantages and limitations will allow further studies related to the identification of musculoskeletal disorders.

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