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Biomedical subjects

P Schnarkowski

Publications and source records attributed to P Schnarkowski.

At least 37 records · Page 2Linked to original sources
PubMed1993

[MR-myelography of the lumbar spine using a PSIF sequence: first experiences].

A rapid gradient-echo acquisition (PSIF) was used to delineate the lumber spine. Because this sequence is heavily T2 weighted the cerebrospinal fluid shows a bright signal, the myelon has a poor signal. 5 healthy volunteers and 5 patients with suspected lumbar disc herniation were examined by this technique. All MR myelograms were compared with spin-echo sequences (sagittal and transversal slices). All lumbar disc herniations which were recognized by MRI were also delineated by MR myelography.

Adult↗
PubMed1992

[Abdominal sonography in primary diagnosis of blunt abdominal trauma].

200 patients with blunt abdominal trauma were scanned by ultrasound primarily. 152 showed a normal sonographic examination. In 24 patients an organic injury was visualised. These 20 splenic injuries, 2 lesions of the kidney, 1 splenic and renal lesion and 1 hepatic and splenic rupture were confirmed by CT in 9 cases, by laparotomy in 9 cases, by sonographic follow-up in 2 cases. 23 patients showed an intraabdominal fluid collection, in 16 patients a decrease was seen by ultrasound. 7 patients were directly operated on because of a visible increase of intraabdominal fluid. The lesions consisted of 3 hepatic ruptures, 2 retroperitoneal bleedings. Ultrasound is a reliable tool in the diagnosis of blunt abdominal trauma on the day of admittance and in the evaluation of injuries in respect of operative or conservative management.

Abdominal Injuries↗
PubMed1992

[Magnetic resonance tomographic imaging of pulsatile CSF movement in communicating hydrocephalus before and after shunt placement].

16 patients with hydrocephalus communicans and 5 healthy volunteers were examined to demonstrate the pattern of the pulsatile CSF flow. After implantation of a CSF shunt system the same patients were examined again to show the influence of the shunt on the CSF pulsations. We used a flow-sensitised, cardiac-gated 2D FLASH sequence and analysed the phase and magnitude images. It could be shown that most patients (n = 12) had a hyperdynamic pulsatile flow preoperatively. After shunt implantation the pulsatile CSF motion and the clinical symptoms were improved in 8 of these patients. MRI of pulsatile CSF flow movement seems to be a helpful noninvasive tool to estimate the prognosis of a shunt implantation in patients with hydrocephalus communicans.

Adult↗
PubMed1992

[Sonographic findings in lateral ligament lesions of the upper ankle joint following conservative and operative therapy].

72 patients with injury of the ankle joint were examined with ultrasound after therapy. Sonographic findings were assessed by plain x-ray films and stress views. In 39 patients an injury of the lateral ligament was treated by surgery and in 33 patients without surgery. 40 patients showed a scar of the lateral ligaments. Patients treated without surgery and showing a scar in ultrasound demonstrated a smaller tilt of the talus in stress views than patients without scars. Measurement of stability was not possible. In conclusion, sonography is a valuable tool in examining the ankle joint after therapy. With regard to stability, stress films cannot be replaced by sonography.

Adolescent↗
PubMed1992

[Radiation dosage during hysterosalpingography using a digital image intensifying technique].

Hysterosalpingography using a digital and conventional image intensification technique was carried out on two groups of 32 patients as part of investigation for infertility. Radiation dose was recorded as surface dose. In 51.7% of digital images and 54.8% of conventional images the findings were normal. Surface dose with conventional technique was 442 +/- 144 cGy/cm2, significantly higher than 207 +/- 113 cGy/cm2 with digital image intensification. The number of exposures was also significantly higher when using the conventional technique. The digital images showed no lack of diagnostic detail when compared with the conventional 100 mm films.

Adult↗
PubMed1992

[Potentialities and limitations of MR angiography in the imaging of intracranial aneurysms].

The potential value of MR angiography in imaging of intracranial aneurysms was analyzed in seven patients. Six cases were confirmed by angiography or computed tomography. In one patient MR angiography was not useful in distinguishing bleeding from an aneurysm. Five aneurysms were imaged by 3D angiography, one was diagnosed by 2D angiography. The extent of thrombosis was evaluated by selective presaturation. MR angiography was a useful non-invasive method in imaging of intracranial aneurysms. However, for complete work-up angiography is mandatory.

Humans↗