Hungarian Radiology

[The radiohygienic aspects of the interventional radiology]

PELLET Sándor, GICZI Ferenc, GÁSPÁRDY Géza, TEMESI Alfréda

MARCH 20, 2007

Hungarian Radiology - 2007;81(01-02)

[Interventional radiology is a relatively new and very rapidly developing cost-effective branch of radiology. Its aim to help or to replace surgical procedures and interventions in many cases are life saving, which are performed by imaging modality control (most commonly angiography or fluoroscopy). During interventional radiological procedures the exposure of staff and patients is usually higher, than in conventional radiography or fluoroscopy. Deterministic effects may also occur. The dosimetry can be carried out by film dosimetry, thermoluminescent dosimetry, DAP meters, semiconductor detectors and personal electronic dosimeter. The basis of reduction of radiation exposure is the radiation protection training. An important rule is that reduction of patient exposure is connected with reduction of staff exposure. With the use of appropriate tools and training the most injuries are avoidable.]



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[2nd National Meeting of the Radiology Residents]

NAGY Endre, PALKÓ András, LOMBAY Béla

Hungarian Radiology

[Scientific conference of Transylvanian Society and Museum]


Hungarian Radiology

[Az emlődaganatok radiológiai vizsgálatának újdonságai Onco Update, 2007]


[Experiences about the breast diagnostic methods are accumulating year-to-year, rapidly. Therefore the current examination algorithm is changing continuously. New diagnostic and therapeutic modalities are entering into the daily practice. Some of them became obsolete, so far their application is becoming a faulty decision. Some other methods become obligatory steps in the diagnostics. These are the reasons why the up-to-date knowledge of the literature is mandatory. Systematic review of the most recent articles of the last two years (January 2005-December 2006) of breast radiological diagnostics and the actual place of the imaging and interventional methods are presented. The following topics are summarized: breast cancer screening with conventional and digital mammography, computer assisted diagnostics (CAD), high risk patients' screening, US, MRI, MSCT, PET/CT, diagnostic interventions, differential diagnostics, percutaneous tumour ablation, therapy-related questions in the diagnostic work up.]

Hungarian Radiology

[Guideline to prevent of nephrotoxic effect of contrast media]

HARIS Ágnes, NAGY Judit, MÁTYUS János

Hungarian Radiology

[Diagnostic and therapeutical possibilities in constipation]


[Constipation is a common gastrointestinal problem. The prevalence of symptoms related with constipation fluctuates from 3 to 20 per cent. Constipation occurs more frequently in the elderly people and in females and more frequent in case of inactivity and less fiber intake. Assesment of patients with severe constipation includes specialized investigations. Exclusion of primary organic causes has to be the first step, then metabolic, neurological and iatrogenic causes (such as medicament side effects, etc) have to be excluded. After these considerations special functional gastroenterological investigations are needed which contribute to the diagnosis and differential diagnosis of the cause of the constipation. Anorectal manometry, ballon expulsion test, defecography and colon transit studies allow us to distinguish between slow colon transit, colon inertia, different subtypes of outlet obstruction, and the constipation predominant irritable bowel syndrome. The evaluation of these specific studies leads to the exact diagnosis and appropriate treatement for their problem can be given to the patients, which always has to be individually planed in all cases.]

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[This review summarizes the diagnostic spectrum, ways of application and methodological difficulties of multislice computed tomographic (MSCT) coronary angiography. The non-invasive assessment of cardiac and coronary anatomy is now possible with computed tomographic coronary angiography using the modern 16 to 64-slice technology. This technique finds its main use today in the screening of patients with moderate probability of having coronary artery disease (atypical chest pain). Its negative predictive value varies between 97% and 99%, thus, a negative result of this non-invasive outpatient procedure can reduce the possibility of coronary artery disease to the minimum. Other important diagnostic applications include the follow-up of patients with coronary artery bypass, accurate diagnosis of coronary artery anomalies, and the simultaneous examination of the heart and great vessels. The future development of the technique is directed to coronary plaque characterization, particularly the detection of vulnerable plaques. The radiation exposure is relatively low (7-13 mSv), comparable with that of invasive coronary angiography.]

Hungarian Radiology

[Self-expanding metallic stents in intrahepatic biliary strictures after liver transplantation]

DOROS Attila, NÉMETH Andrea, HARTMANN Erika, DEÁK Pál Ákos, JUHAROSI Gyöngyi, LÉNÁRD Zsuzsa, KOZMA Veronika, GÖRÖG Dénes, GERLEI Zsuzsa, FEHÉRVÁRI Imre, NEMES Balázs, KÓBORI László

[INTRODUCTION - Bile duct complications remain a key problem of liver transplantation. Two main types are recognized: anastomotic and intrahepatic. In cases of anastomotic strictures good results can be achieved with surgery or minimally invasive therapy. Intrahepatic stenosis usually requires retransplantation. In this report the results of intrahepatic metallic stent placements are analyzed. PATIENTS AND METHODS - Since 1995, 20 patients with intrahepatic bile strictures were referred for percutaneous treatment. Of 34 percutaneous transhepatic cholangiography, 33 successful drainages were performed and 58 balloon dilatations were employed to overcome. In 13 patients, 20 metallic stents were implanted. One bleeding complication was successfully treated with selective embolization. RESULTS - The average follow up time was 35 months. 14 patients have no symptoms, 12 of them after metallic stent placements and 4 of them after retransplantation (2 patients had metallic stents at retransplantation). One patient has metallic stent and an external drain waiting for retransplantation. Three patients died after 7 retransplantations. Two patients died on the waiting list, one with and one without external drain. There were no deaths after successful metallic stent placement. CONCLUSION - After meticulous preparations metallic stent placement is safe and effective in intrahepatic biliary stenosis after liver transplantation. The patients can be stabilized till the retransplantation, or it can even be avoided.]

Hungarian Radiology

[Prevention of thrombotic complications in vascular interventional procedures]


[Procedures of vascular interventional radiology is linked inevitably a certain amount of risk of thrombotic complications, like intimal and vascular wall injuries, increased thrombotic risk caused by the catheter itself, etc. The first approach of thrombotic prevention was achieved by acetyl salicylic acid in case of peripheral arteries, this treatment was later replaced by long-term anticoagulation. Opportunities were provided by the recognition of risky blood characteristics in relation to thrombotic complications. Consequently, a well performed preparation and premedication of the patients could reasonably decrease the risk. The most important steps are the cessation of smoking, normalization of hemoconcentration and antithrombotic premedication. Better understanding of the nature of atherosclerotic progression led to the introduction of long-term fibrinolytic inhibition therapy. In the past decades beside patients with vascular stenosis, the oncology patients are also treated by different radiological interventions, like intraarterial chemotherapy and chemoembolization. The use of several-day-long infusion represent a new challenge, the treated vessels, the lumen and the surface of the catheter must be prevented of thrombosis. For this purpose a few suitable drugs can be applied with mild anticoagulant and fibrinolytic stimulating effect. We use the sodium pentosan polysulphate.]

Hungarian Radiology

[The possibilities of invasive radiological therapy of deep venous thrombosis and in vitro experimental examination of therapeutic factors affecting the treatment]


[INTRODUCTION - The first part of this paper is an overview on the possibilities of invasive radiology treatment of deep venous thrombosis. In the next part an in vitro experiment is described demonstrating the basics of mechanical and pharmaco-mechanical catheters applied in deep venous thrombosis. MATERIALS AND METHODS - The in vitro haemodinamic model of the iliocaval veins contained a thermostat and an engine responsable for pulsing circulation according to the venous system. We tested the chance of driftage of thrombus in different age according to the state of the collateral system. Thrombectomy was made by mechanical (Simpson-catheter) and pharmaco-mechanical (Pulsespray catheter) ways. The weight of the non-drifted thrombi was measured. RESULTS - All the 16 thrombus were flown while collateral system was closed and none of them were flown while the collateral system was open but the rate of their solubility was different. The efficacy of the thrombus-removal by Simpson catheter was better than by Pulse-spray catheter and fresh thrombus-fragments were more soluble than older ones. CONCLUSION - By this in vitro experiment we opened the way for using mechanical and pharmaco-mechanical catheters in deep venous thrombosis.]

Hungarian Radiology

[Current questions of quality assurance in diagnostic radiology in the light of a visit to England]


[Physical-technical aspects of quality assurance in diagnostic radiology, because of its dependence on technology are of an extraordinary importance. The intention of Hungary to join EU makes at least the decrease of our lag in this respect unavoidable. Ministerial order 31/2001 (X. 3.) EüM which already came into force requires quality assurance in diagnostic radiology explicitly. This paper starts with definition of basic concepts, then outlooks shortly the history and present international situation of quality assurance in diagnostic radiology. We review preliminaries and the present situation in Hungary, including results of the National Patient Dose Assessment Programme till now. We think that the most efficient help to the initial steps of quality assurance in diagnostic radiology in Hungary may be the appropriate adaptation of experiences of the leading countries. Therefore we review experiences of one of the authors gained during visiting three medical physics centres in England in details. The following topics are discussed: legal requirements, types and levels of measurements, organizational problems, practical evaluation of measurements (including criteria of discarding equipment), patient dosimetry, personal dosimetry, mammography research, instrumentation of the radiology departments, calibration of measuring devices, questions of the so-called type testing and radiation protection training of workers.]