[Periodogram analysis for signal and noise evaluation in roentgen video signals].

Movements of the heart, the large vessels and the gastrointestinal tract can be evaluated for diagnostic purposes using fluoroscopic video systems. A new means of quantitatively evaluating the signal and noise components of the video signal is described. The signal and noise power components are determined from the periodogram after prior Fourier analysis.

[Results of animal experiments with videodensitometry in the assessment of gastrointestinal motility].

It is possible to register video-densitometrically the gastrointestinal motility visible in fluoroscopic image using a video-signal analyser. The influence of metoclopramide at the propulsive movement of the stomach wall of rats was checked in vivo. The propulsive gastric movement increased in case of small doses of metoclopramide, higher doses stopped the motility.

[Conventional roentgen functional diagnosis--videodensitometry. 4. Conventional roentgen videodensitometry exemplified with peri-cardiac vessels].

It is possible to record movement-parameters by means of roentgen videodensitometry of the great central vessels as well the pulmonary artery as the thoracic aorta visible in fluoroscopic image (provided by videorecorder). We could noninvasively measure pre-ejection periods (PEP) for the right heart (PEP f) as well for the left heart (PEP g) by synchronous electrocardiography for each cardiac action and for each examination process. It is important to form a quotient between PEP f and PEP g in the individual case.

[Conventional roentgen functional diagnosis--videodensitometry. 3. Conventional roentgen videodensitometry exemplified by the heart].

It is possible to record movement parameters video densitometrically and synchronously by means of a video signal analysator at various points of the organ surface visible via fluoroscopic images (provided by videorecorder). Movement parameters of the heart surface were signed just in the same cardiac action by synchronous electrocardiography. There are some difficulties in this method according to evaluation with reference to laevocardiography in consequence of functional variety of the heart and the different exercise conditions.

[Conventional roentgen functional diagnosis--videodensitometry. 2. Clinical imaging site for noninvasive diagnosis of organ motion].

By means of the described system it is possible to measure and as well analog as digital process the organ movement, needing a X-ray television system for flouroscopy and a videotape for continuously recording. Using the densitometric principle measurements of time and a quantitative form analysis of the curves are performed. After border recognition and using the topometric principle, the local organ motion can be evaluated.

[Conventional roentgen functional diagnosis--videodensitometry. 1. Densitometric and topometric measurements of roentgen video images: technique and method of measuring].

It is possible to measure movements in the human body with the help of X-ray television systems. A great number of different techniques has been published in the scientific literature. They all based on only two principles with qualitative differences in signal acquisition.

[Serological diagnosis of cytomegalovirus-induced interstitial pneumonia in patients following bone marrow transplantation].

For diagnosis of the interstitial pneumonia conditioned by cytomegalovirus (CMV) an indirect immunofluorescence test was used to measure IgM and IgG antibodies to CMV in 369 serum specimens from 41 patients after bone marrow transplantation (BMT). An interstitial pneumonia conditioned by CMV was diagnosed in 5 patients either serological (4 patients) or by detection of cytomegaloviral infection typical inclusion bodies in lung cells (1 patient). The detection of antibodies to CMV for diagnosis of interstitial pneumonia conditioned by CMV is problematical in the phase immediately after BMT because bone marrow recipients are severely immunosuppressed by radiation and cytotoxic drugs received before transplantation.

[The diagnosis of functional epigastric syndrome].

The radiological examination of the stomach and the duodenum under functional aspects resulted in references of an irritative stomach in patients with epigastric complaints without conceivable organic findings lasting for many years. On the basis of simultaneously established peculiarities in the behaviour and the social situation of the patients concerned the disturbance of kinetics demonstrated is realized with great probability and explained as pathological by the patient. The results of the examination may be points of influence for the therapy of such disturbances.

[Videodensitometry analysis of stomach wall motility--presentation of a new method].

The videodensitometry is a suitable method for recording the gastric wall motility. It provides biosignals amenable by computer. There are no special demands to any organic form or kind of contraction.

[Development of body weight in males of the Wurzen district 1961-1983].

In 1961, 1971 and 1983 additional medical parameters, among them body length and body weight, were established during the mass radiographies in the district of Wurzen. From the data of 7,670 males from the year 1983 for two 10-year age groups regression equations between body weight and body length were determined. The calculation of relative weights was performed on the basis of the optimum weights after Ott.

[Noninvasive roentgen diagnosis of right heart function in patients with recirculation disorders and chronic nonspecific lung changes].

The non-invasive x-ray functional diagnostic electroradiographic method at the large vessels near the heart may enrich the radiological preliminary diagnostics of recirculation abnormalities. In chronic unspecific pulmonary diseases it can characterize the load of the right heart. Our studies should serve as a pilot study for the in future possible, simply to be handled non-invasive video-densitometry of the vessels near the heart in the preliminary diagnostics of cardiovascular diseases.

[Differential diagnosis of the malabsorption syndrome].

The paper reports on a cachectic patient who hitherto was treated as a case of pernicious anaemia. After a 20-year course of the disease a malabsorption syndrome as a result of an atrophic duodenitis was diagnosed.

[The value of computer tomography in the postoperative long-term surveillance of patients with a vascular prosthesis for aorta replacement].

Because of the possibility of life-threatening late complications by anastomotic aneurysms and the danger of their rupture, all patients in whom a coarctation of the aorta was resected and replaced by a vascular prosthesis must be followed up continuously for life. Their chest x-rays show-in addition to unequivocally normal or pathological findings-sometimes questionable variations of the aortic outline, which must be diagnosed definitely by further investigations. By means of computerized tomography, the suspicion of an anastomotic aneurysm can either be refuted or confirmed in almost all cases.

[Determination of the systolic time interval in normal subjects from electrokymographic studies of vessels near the heart].

By means of electrokymography curves of the motion of the vascular margin of the large vessels near the heart, aorta and pulmonary artery, may be recorded noninvasively. Since these curves of motion widely correspond to the central curves of the arterial pulse it is possible to state systolic time intervals separately for the right and left heart. Analogically to the presphygmic index after Rentsch with global evidence on the left-ventricular function of the heart these are possible for the outflow way of the right ventricle, also by formation of the quotient of the electrokymographically established STI.

[Surface and electrokymography of the ventricular wall of the heart in a comparison of myocardial function in patients with myocardial infarct].

We examined 21 patients with infarction of the anterior or lateral wall and 29 patients with infarction of the posterior wall at an average age of 48.3 years in rehabilitation stage II by means of kymographic methods. By reason of our results the surface kymogramme is a valuable screening method for the recognition of a pathological movement of the ventricular wall in myocardial infarction.

[Cardiac x-ray findings and vascular calcification in arterial obstructive disease in the pelvic and leg region. II].

In 117 patients with arterial obstructive disease in the region of pelvis and leg compared with test persons with healthy vessels the percentage of the deformation of the heart according to the classification after Richter was significantly higher for the left-side prevailing bilaterally loaded heart as well as for the left-ventricularly loaded heart. No differences could be ascertained between hypertonic and normotonic patients with ill vessels. In the patients compared with the clinically healthy test persons we registered surface-kymographically and electrokymographically more frequently a pathological marginal movement of the heart as a reference to a myocardial dysfunction.

[Cardiac findings and vascular calcification in arteriosclerotic obstructive disease in the pelvis and leg region. I].

In 117 patients with angiographically ascertained arteriosclerotic obstructive disease in the region of pelvis and leg the smoking of cigarettes in a high degree confirmed itself as atherogenic factor of risk. The rate of hypertension of patients with vascular disease was increased in comparison with the average population. In contrast to a control group of test persons who after clinical angiological examination did not give a clue to a vascular disease the patients with vascular diseases shows a significantly higher percentage of radiologically visible calcifications in the region of the abdominal aorta, the iliacal and the peripheral arteries of the legs.

[Cardiovascular radiography, changes in the thoracic aorta, ECG and clinical parameters in hypertension. 2. Changes in the thoracic aorta in hypertension].

In 142 hypertensives and a control group of 230 normotensives the measure of the aorta after Kreuzfuchs was estimated. In the two groups a significant increase of the width of the aorta was found with growing age. Whilst the width of the aorta concerning the degree of severity I of hypertension on an average were slightly below those of normotensives, they were increased in the degrees of severity II and III, but a further increase could not be ascertained at the transition from degree of severity II to III.

[Cardiovascular x-ray findings, changes of the thoracic aorta, electrocardiographic and clinical parameters in hypertension. 1. Cardiovascular x-ray findings in hypertension].

We examined 142 hypertensive patients of special consulting hours for hypertension. In a subdivision into 3 degrees of severity of hypertension and into the age groups less than or equal to 50 years and greater than 50 years X-ray findings on the heart and on the large vessels near the heart were made. Patients with blood pressure values RRs greater than or equal to 160 Torr and RRd greater than or equal to 95 Torr had these findings in 78%.

[Behavior of hypertension and cardiovascular findings in hypertension within an observation period of 10 years (the Wurzen study 1961-1971)].

In concert with literary data during a mass X-ray examination in 1961 we established in 5,517 men of the district Wurzen a frequency of hypertension of 13.6% and in 1971 in the same group of test persons a frequency of hypertension of 19.4%.