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Biomedical subjects

W Dihlmann

Publications and source records attributed to W Dihlmann.

At least 37 records · Page 2Linked to original sources
PubMed1991

[Alloarthroplasty of the hip joint. Radiologic diagnosis of loosening and infection in cemented total endoprostheses].

Patients with problems following implantation of cemented total hip prostheses must be clinically examined. This examination is followed by a series of diagnostic imaging procedures. These include X-ray diagnosis, 3-phase 99mTc-MDP bone scans, scintigraphy for inflammation, and arthrography, performed singly or as sequential studies. X-ray findings and scintigraphic patterns arousing or confirming a suspicion of aseptic (mechanical) or septic (infectious) loosening of the prosthesis are evaluated and discussed.

Hip Prosthesis↗
PubMed1990

[Supercilium acetabuli. A stress indicator of the hip joint cartilage].

A thousand radiographs of the hip joints in adults were evaluated quantitatively and the following statistical conclusions were drawn: the normal forms of the supercilium acetabuli are either parallel or convex. Wedge-shaped supercilia indicate increased stress on the cartilage only in cases with hip dysplasia. A supercilium of more than 4mm raises the suspicion of increased stress on the cartilage. Normally, the joint space as shown on a radiograph does not fall short of 3mm. Eight formulas have been defined which can be used after planimetry of the supercilium and the articular surface in order to indicate increased stress on the cartilage and a risk of developing an arthrosis of the hip. These formulae are of practical value if the radiographs appear normal to visual inspection.

Acetabulum↗
PubMed1989

[The bursa iliopectinea--a morphologic-computed tomographic study].

Study of 80 anatomical preparations and CT of 130 patients has shown that the ilio-pectineal bursa may be non-communicating, communicating or septate. Under certain morphological and pathological conditions the ilio-pectineal bursa may be visible on CT. Amongst these is the presence of fat or calcium in or around the bursa. Effusions into the hip joint may make it possible to identify the bursa on CT, even when it is non-communicating. A posterior arthrocoele of the hip joint is described and its CT appearances are demonstrated.

Aged↗
PubMed1989

[Pre- and postoperative magnetic resonance tomography of osteochondrosis dissecans].

Thirty-five patients treated surgically and three treated conservatively were examined by MRT. This proved to be an imaging method which could provide information concerning the state of the bone fragments, the continuity of the joint cartilage and the state of reintegration of the dissected fragment. This was fixed by means of fibrin, autologous spongiosa and resorbable pins.

Follow-Up Studies↗
PubMed1989

[Does technetium scintigraphy in combination with gallium scintigraphy improve the differential diagnosis of aseptic and septic endoprosthesis loosening?].

In the majority of cases, 3-phase scintigraphy using Tc99m phosphate complexes is sufficient to diagnose a septic (infective) loosening of an endoprosthesis (hip or knee). Additional Ga 67 citrate scintigraphy should be considered only if technetium scintigraphy fails to supply an unequivocal finding. This is explained by the authors in detail.

Aged↗
PubMed1988

[Computed tomography of the soft tissues of the shoulder. 3. Periarthropathia calcificans humeroscapularis].

Computed tomography of the soft tissues of the shoulder in cases of calcifying tendinitis of the rotator cuff provides the following information: 1. Localisation of the calcium deposits within the rotator cuff. 2. Contours and density of the calcium deposits correlated with the clinical findings as described by Uhthoff et al. Ill-defined contours and non-homogeneous deposits are associated with more severe clinical features. 3. Computed tomography shows that apatite particles, which are not visible radiologically, may penetrate into the shoulder joint and produce synovitis with an effusion. This is of importance in local therapy.

Calcinosis↗
PubMed1988

[The acquired hyperostosis syndrome. Synthesis of 13 personal observations of sternocostoclavicular hyperostosis and 300 cases from the literature. 1].

Sterno-costo-clavicular hyperostosis (SCCH) is the most common manifestation of a syndrome, consisting of increased bone metabolism, mostly new bone formation and heterotopic ossification of fibrous tissue, which we have characterised as the acquired hyperostosis syndrome. In part I we discuss the terminology, radiological appearances, scintigraphy, clinical and laboratory findings, bacteriology, histology, nosology, complications, treatment and differential diagnosis of SCCH. Chronic recurrent multifocal osteomyelitis (CRMO) is regarded as a phenotype of SCCH, depending on the age. CRMO occurs in children, adolescents and young adults, SCCH predominantly in middle-aged and elderly adults.

Adult↗
PubMed1988

[The acquired hyperostosis syndrome. 2].

In the second part of this publication, we describe some additional findings in cases of sternocostoclavicular hyperostosis. These include focal hyperostosis of the spine, in the pelvis and in the extremities and psoriatic skin lesions and severe forms of acne (acne conglobata, acne fulminans). Other features, which are not diagnostic, include erosive or non-erosive peripheral arthritis and unilateral or bilateral sacro-iliitis. An analysis of our 13 patients and of the relevant literature indicates that the hyperostosis is due to increased bone metabolism and heterotopic ossification of fibrous tissue and that these are the pathogenic bases of the changes in the axial skeleton, the pelvis and the bones of the extremities. We have suggested a scheme which would categorize the syndrome into complete, incomplete and possibly acquired forms.

Adult↗
PubMed1988

[A holding device for standardized roentgenologic detection of ulnar, palmar and radial capsule ligament lesions of the metacarpophalangeal joint of the thumb. Hyperextensometer for the index finger metacarpophalangeal joint for determining laxity of the ligament].

A device has been designed to hold the limb for standardized radiological demonstration of lesions of the ulnar and radial collateral and palmar ligaments of the metacarpophalangeal joint of the thumb. The device also serves as a hyperextensometer of the metacarpophalangeal joint of the index finger with which to measure joint laxity. The simple mechanism allows routine application. Standardized stressed roentgenograms allow exact quantification of the extent of all lesions and consequently leads to adequate treatment.

Finger Injuries↗
PubMed1987

[Lumbar reprolapse or scar tissue? An attempt at differentiation via a computer tomographic bicolor mode].

The bicolour mode for computer tomography is explained. It replaces the soft tissue level of the computer tomogram by setting the window level to +55 Hu and its width to 1 Hu. Structures in the spinal canal with attenuation values greater than 56 Hu appear white. The cauda equina has an attenuation value of less than +45 Hu. Disc prolapses, scar tissue and solid tumours (with the exception of lipomas) have attenuation values greater than +55 Hu. The use of the bicolour mode combined with intravenous contrast in patients with post-operative symptoms can often help to differentiate between reprolapse and scarring. A time-saving method for the bicolour mode is described.

Cicatrix↗
PubMed1987

[Computed tomography of the soft tissues of the shoulder. 1. Synovial reactions].

CT of the soft tissues of the shoulder without intra-articular contrast injections is useful for demonstrating effusions and synovial proliferation in the shoulder joint, in the bursa and in the synovial coverings of the long head of the biceps. The authors describe, for the first time, an intracapsular collection of fat in the posterior aspect of the capsule. This can be demonstrated via CT in 80% of the population. This fat line is displaced by even a few ml. of fluid in the presence of an effusion.

Bursa, Synovial↗
PubMed1987

[A holder for plain x-ray visualization of ulnar, volar and radial injuries of the capsule and ligaments of the basal thumb joint. A hyperextensometer for the determination of the ligamentous laxity of the index finger basal joint].

We have constructed a device for standardized radiodiagnostics of ulnar, volar, and radial capsulo-ligamentous lesions of the basal thumb joint. Used as hyperextensometer at the basal joint of the index finger, the device is of equal value in the diagnosis of ligamentous laxity.

Finger Injuries↗
PubMed1985

[Lumbar computed tomography in a bicolor mode].

The interpretation of lumbar computer tomograms depends on the qualitative and quantitative assessment of the contents of the spinal canal and of its surrounding structures. This is a time-consuming process. A bi-colour presentation is described which provides simultaneously qualitative and quantitative information. It speeds up the process of interpretation and improves accuracy.

Color↗
PubMed1985

[The asterisk sign and adult ischemic femur head necrosis].

The asterisk sign is a stellate density, which is seen normally in the femoral head on computed tomography. It is due to the demonstration of the trabeculae in the femoral head. In adult ischaemic necrosis of the femoral head, there are characteristic changes in the asterisk sign at an early stage, even before there is collapse of the head. The changes are described and the indications for performing CT of the hip for diagnosing adult ischaemic necrosis are discussed.

Adult↗