PubMed Health⌕ Search

Biomedical subjects

F Machiels

Publications and source records attributed to F Machiels.

At least 19 recordsLinked to original sources
PubMed2003

Can bone marrow edema be seen on STIR images of the ankle and foot after 1 week of running?

PURPOSE: To evaluate whether initiation of running in sedentary individuals would lead to bone marrow edema on MR images, within the time span of 1 week. MATERIALS AND METHODS: The feet of 10 healthy volunteers were imaged by MR imaging before and after running during 30 min a day for 1 week. The images were evaluated by consensus of 2 musculoskeletal radiologists who graded the presence of bone marrow edema on a 4-point scale. Edema scores and number of bones involved before and after running were compared statistically. RESULTS: Edema was present on the baseline images in 3 subjects. After running edema showed an increase or was present in 5 subjects. The changes after running were statistically significant. Bones involved were the talus, calcaneus, navicular bone, cuboid bone, and 5th metatarsal. CONCLUSION: Edema patterns can be seen in the feet of asymptomatic individuals. During initiation of running an increase of edema or development of new edema areas can be seen.

Adult↗
PubMed2001

MR imaging of meniscal cysts: evaluation of location and extension using a three-layer approach.

PURPOSE: To analyze the extension of medial and lateral meniscal cysts relative to the capuloligamentous planes of the knee. MATERIALS AND METHODS: The MR images of 32 patients with meniscal cysts were reviewed. The location and extension of the meniscal cysts with reference to the capsule and ligaments were recorded. RESULTS: Most medial meniscal cysts were located posteromedially. Posteromedial meniscal cysts usually penetrated the capsule and were located between layer I and the fused layers II+III. From this site some extended anteriorly and then became located superficial to the superficial MCL. The location of lateral meniscal cysts was more varied. Anteriorly the cysts were located deep to the iliotibial band, whereas posterolateral cysts were located deep to the lateral collateral ligament. CONCLUSION: Although the site of capsular penetration of meniscal cysts is determined by the location of meniscal tears, the possible pathways of extension appear to be determined by the capsuloligamentous planes of the knee.

Adolescent↗
PubMed2001

Arthrographic and CT arthrographic findings in dorsal peripheral detachment of the triangular fibrocartilaginous complex.

Arthrography and CT arthrogram were evaluated in the diagnosis of dorsal peripheral detachment of the triangular fibrocartilaginous complex (TFCC) in the wrist. The imaging findings and medical records of 19 patients, who underwent surgical repair of a dorsal peripheral detachment of the TFCC, were retrospectively studied. Diagnoses were based on the results of the arthrography and CT arthrogram as well as on the clinical examination. The arthrographic features assessed included abnormal filling of the tendon sheath of the extensor carpi ulnaris (ECU) and irregular contrast extravasate in the dorsal ulnar and peristyloid region. The findings on arthrography and CT arthrography were correlated with the arthroscopic results. In conclusion, the arthrographic signs seem to be reliable findings in the diagnosis of dorsal detachment of the TFCC.

Adult↗
PubMed1999

Tarsal tunnel syndrome: ultrasonographic and MRI features.

Tarsal tunnel syndrome is a well-known but rare entrapment neuropathy involving the posterior tibial nerve in the tarsal tunnel, a fibro-osseous channel extending from the medial aspect of the ankle to the midfoot. Posttraumatic fibrosis, ganglion cyst, tenosynovitis, tumor of the nerves or other structures, dilated or tortuous veins can cause significant nerve compression in this anatomic region. Herein, we present the typical ultrasonographic and magnetic resonance features of this disorder in patient with a ganglion cyst.

Adult↗
PubMed1998

Subcutaneous granuloma annulare: MR imaging findings.

We present a case of subcutaneous granuloma annulare evaluated with MR imaging. The mass was poorly defined and showed thickened interconnecting strands with low signal intensity on T1- and T2-weighted MR images. When a poorly defined subcutaneous mass with low signal intensity on both T1- and T2-weighted MR images is observed in an otherwise healthy child, subcutaneous granuloma annulare should receive serious consideration. Subcutaneous granuloma annulare should be added to the list of tumors with short T2.

Buttocks↗
PubMed1998

Deep benign fibrous histiocytoma of the knee: CT and MR features with pathologic correlation.

Magnetic resonance imaging and pathologic findings in a 28-year-old patient with a giant deep benign fibrous histiocytoma in the popliteal fossa of the right knee are described. The MR imaging findings include a well-delineated oval mass with low signal intensity on T1-, and high signal intensity on T2-weighted, images, and marked peripheral contrast enhancement. To the best of our knowledge, this is the first report on the MR findings in this entity.

Adult↗
PubMed1998

MRI of extrapancreatic gastrinomas.

Preoperative diagnosis of gastrinoma--especially extrapancreatic gastrinoma--is very difficult. At the moment octreotide scintigraphy is considered the method of choice to detect gastrinomas. However, MRI may play a major role in the diagnostic imaging of gastrinoma.

Contrast Media↗
PubMed1998

Benign papilloma of the bladder in a young adult.

Ultrasonographic and pathologic findings in a 26-year-old patient with a benign papilloma of the bladder are described. Ultrasound features include an irregular polypoid mass extending from the bladder wall.

Adult↗
PubMed1998

Calcium hydroxyapatite deposition disease of the neck: finding in three patients.

Calcium hydroxyapatite deposition disease may occasionally involve the superolateral portion of the longus colli muscle. Clinical symptoms include headache, neck pain, and dysphagia. Characteristic prevertebral calcifications with the epicenter at the C1-C2 level are depicted on lateral radiographs of the cervical spine.

Adult↗
PubMed1998

Glenoid dysplasia: radiographic and CT arthrographic findings.

A 60-year-old man with dysplasia of the glenoid and a rotator cuff tear is reported on. Because of the tear, CT arthrography was performed, offering an opportunity to evaluate the various soft tissue abnormalities accompanying glenoid dysplasia. Marked thickening of the glenoid cartilage and labrum was apparent, as well as an abnormal posterolateral orientation of the glenoid cavity. A deep notch was observed along the central portion of the glenoid cartilage. Furthermore the middle glenohumeral ligament appeared thickened and cordlike.

Arthrography↗
PubMed1997

Imaging in sports-medicine--knee.

Since the last decade, the introduction of Magnetic Resonance Imaging has provided a powerful new tool for the clinician to diagnose sports-related knee injuries. The main objective of this paper is to familiarise the relevant specialists with the proven clinical indications and semiology of MRI of the knee. At the present time, the knee joint is the area in which the advantages of MRI are most spectacularly apparent. The MR appearances of meniscal tears in particular, are first discussed in detail, referring to recent literature and personal experience based on more than ten thousands MR examinations of traumatic knees. Also the mechanisms of injuries and the most commonly involved sports are described. The precise types of meniscal lesions, as visualised at arthroscopy, are abundantly illustrated on MR images: e.g., bucket-handle, radial and horizontal cleavage tears, meniscocapsular separations, discoid menisci and meniscal cysts. We discuss the numerous pitfalls due to neighbouring anatomical structures as well as non clinically or surgically significant intrameniscal hypersignals in athletes. Towards other imaging techniques, MRI is particularly suited for the diagnosis of ligamentous injuries, especially the cruciate ligaments. We develop the currently used direct and indirect signs of rupture, the diagnostic difficulties related to the age of trauma and the detection of associated lesions. Sport-induced tendinous and bursal pathology is another interesting indication of MRI, not only lesions of the more superficial extensor tendons but also the pes anserinus or hamstring tendons. We finally treat the recent developments of MRI in assessment of cartilage, subchondral and medullary bone disorders of traumatic or microtraumatic origin.

Athletic Injuries↗
PubMed1997

[A "good choice" of diagnostic imaging examinations: the knee].

A medically sound and cost-effective choice of diagnostic imaging investigations in knee pathology must be supported by a good evaluation of the respective strong and weak points of the available methods. These are: conventional radiology, C.T., arthrography, arthro C.T., ultrasound, scintigraphy and magnetic resonance imaging. Based upon that analysis, decisional algorithms are proposed, in function of the clinically suspected pathologies.

Algorithms↗
PubMed1996

Jejunal stromal tumor.

A case of jejunal stromal tumor is reported. Clinical findings included melena, syncope, and palpable abdominal mass. CT scans showed an abdominal mass with characteristics simulating an intra-abdominal abscess.

Aged↗
PubMed1996

Squamous cell carcinoma of the urethra: ultrasonographic findings.

Urethral carcinoma is a rare neoplasm and only recently MR imaging has been applied to evaluate these tumors. Ultrasonography has mainly been used in the evaluation of urethral strictures. In the present paper a patient with squamous cell carcinoma of the urethra is reported and findings on ultrasonograms are described. Ultrasonography depicted the intraluminal tumor, in contrast to retrograde urethrocystograms, which appeared inconspicuous.

Aged↗