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At least 559 records · Page 31Linked to original sources
PubMed1992

The usefulness of K-edge filters in automatic brightness controlled fluoroscopy and digital subtraction angiography.

This paper presents the results of a study in which the efficacy of using high atomic number K-edge filters in place of non-selective filters, in Automatic Brightness Controlled fluoroscopy and Digital Subtraction Angiography was examined. Filters investigated in the study were copper, and aluminium [as examples of non-selective filters], gadolinium, erbium and tantalum. The results of this study would suggest, with the possible exception of gadolinium as an added filter in angiography of thin anatomical parts, that the selective K-edge filters offer no particular advantage over the non-selective filters from the viewpoint of either patient dose reduction or image contrast. Further, for imaging of all but the thinnest anatomical parts, their use adds substantially to the problems of x-ray tube loading.

Angiography, Digital Subtraction↗
PubMed2005

A novel radiation protection drape reduces radiation exposure during fluoroscopy guided electrophysiology procedures.

OBJECTIVE: The purpose of this study was to evaluate a novel disposable lead-free radiation protection drape for decreasing radiation scatter during electrophysiology procedures. BACKGROUND: In recent years, there has been an exponential increase in the number of electrophysiology (EP) procedures exposing patients, operators and laboratory staff to higher radiation doses. METHODS: The RADPAD was positioned slightly lateral to the incision site for pectoral device implants and superior to the femoral vein during electrophysiology studies. Each patient served as their own control and dosimetric measurements were obtained at the examiner's elbow and hand. Radiation badge readings for the operator were obtained three months prior to RADPAD use and three months after introduction. RESULTS: Radiation dosimetry was obtained in twenty patients: 7 electrophysiology studies, 6 pacemakers, 5 catheter ablations, and 2 implantable cardioverter-defibrillators. Eleven women and nine men with a mean age of 63 +/- 4 years had an average fluoroscopy time of 2.5 +/- 0.42 minutes per case. Mean dosimetric measurements at the hand were reduced from 141.38 +/- 24.67 to 48.63 +/- 9.02 milliroentgen (mR) per hour using the protective drape (63% reduction; p < 0.0001). Measurements at the elbow were reduced from 78.78 +/- 7.95 mR per hour to 34.50 +/- 4.18 mR per hour using the drape (55% reduction; p < 0.0001). Badge readings for three months prior to drape introduction averaged 2.45 mR per procedure versus 1.54 mR per procedure for 3 months post-initiation (37% reduction). CONCLUSION: The use of a novel radiation protection surgical drape can significantly reduce scatter radiation exposure to staff and operators during a variety of EP procedures.

Electrophysiologic Techniques, Cardiac↗
PubMed2006

Percutaneous sacroplasty using CT fluoroscopy.

Sacral insufficiency fractures frequently cause significant pain and limit activities of daily living in patients with osteoporosis. Percutaneous vertebroplasty is a common procedure to alleviate the pain associated with thoracic and lumbar vertebral compression fractures. The sacral percutaneous vertebroplasty procedure (sacroplasty) has recently been introduced as an alternative to medical management of osteoporotic sacral insufficiency fractures. We describe our CT fluoroscopy technique in performing percutaneous sacroplasty.

Administration, Cutaneous↗
PubMed1991

Percutaneous catheter drainage for acute empyema. Improved cure rate using CAT scan, fluoroscopy, and pigtail drainage catheters.

Percutaneously inserted pigtail nephrostomy catheters were used to treat empyemas in 12 patients. Thoracic computed tomographic (CT) scan and fluoroscopy were used to localize precisely and place the catheters into loculated collections of fluid. Percutaneous catheter drainage (PCD) of empyema was successful in seven of seven patients (100%) in whom standard tube thoracostomy (STT) had initially failed and in three of five patients (60%) who had PCD as the initial drainage procedure. Overall, PCD was successful in treating empyema in ten of 12 patients (83%). The procedure was well tolerated and there were no complications. PCD is a safe and effective method for drainage of loculated empyemas as the initial procedure or after STT has failed.

Acute Disease↗
PubMedDate not supplied

Assessment of tibial torsion employing fluoroscopy, computed tomography and the cryosectioning technique.

Accurate assessment of tibial torsion, particularly the rotational deformity of a stabilized tibial fracture, demands precise anatomic landmarks at the proximal and distal measuring sites of the tibia. A fluoroscopic method has been proposed, utilizing the orientation of the femoral condyles and the medial malleolus to constitute two lines of reference. The relevance of using these structures for the assessment was studied while employing fluoroscopy, computed tomography, and the cryosectioning technique in 10 necropsy specimens of the human tibia. In all specimens the lines of reference were determined by each method and the tibial torsion was measured as the angle between the lines. The medial malleolus and the femoral condyles were found to present reliable anatomic landmarks for determination of the lines of reference in all employed techniques. The maximum difference between results obtained with different methods in a given specimen was 5.4 degrees. The average difference between results with two techniques and two observers varied from 1.0 to 1.5 degrees. The reproducibility of the fluoroscopic method, described by the estimated standard error of a single determination, was 1.3 degree.

Fluoroscopy↗
PubMedDate not supplied

Digitized intra-operative video-fluoroscopy cholangiography. An analysis of 100 cases.

Experience is reported of intra-operative fluoroscopy in 100 cholecystectomized patients using bilateral video- and tele-communicating systems between the surgeon and the conducting radiologist. The radiologist's guidance and the surgeon's realtime observation of the intra-operative study together with reduction in the mean operation time constitute the main advantages of this technique.

Adult↗
PubMed1986

Percutaneous fine needle biopsy of abdominal and pelvic lesions. Passes necessary for secure diagnosis with fluoroscopy and CT-guidance.

The number of passes performed at each occasion of biopsy of abdominal and pelvic lesions was recorded in 296 patients. In 178 patients the percutaneous fine needle-biopsy was guided by fluoroscopy (FL), in 118 by computed tomography (CT). At FL correct results were obtained in 73% of the patients, at CT in 91%. The highest accuracy was obtained at biopsy of adrenals, kidneys, ureter and soft tissue masses and the lowest accuracy in the pancreas. 59% of the correct diagnoses were obtained at the first pass at FL, the corresponding figure at CT was 81%. At least 3 passes were necessary for obtaining diagnostic material of the pancreas while for other organs and soft tissue masses 2 passes often were sufficient. In most patients with false negative/inconclusive diagnoses or with non-representative material only 2 passes had been performed.

Abdominal Neoplasms↗
PubMed1979

[Dose and time-saving fluoroscopy by means of immediate reproduction of a high-quality stored image (author's transl)].

A report is given on a special unit for use with an X-ray television chain, which permits the immediate reproduction of views stored during fluoroscopy, and thus speeds up the establishment of a reliable diagnosis. The stored images are also available during the examination. They clearly show whether the phases of functional processes needed for assessment purposes are actually represented. The result is that additional radiography is avoided, the patient subjected to less exposure the examination procedure shortened. A comparison with the corresponding 100 mm image intensifier views in clinical examples shows that the quality of the stored image is completely adequate for the establishment of the diagnosis.

Crohn Disease↗
PubMed1974

Breast cancer following multiple chest fluoroscopy: the Ontario experience.

The hypothesis, derived from experience in Nova Scotia, that artificial pneumothorax, requiring repeated fluoroscopy of the chest, is associated with an increased risk of subsequent breast cancer was tested in Ontario by means of a retrospective cancer patient/control study using record linkage. Sanatorium patients treated by artificial pneumothorax were estimated to have incurred a risk of breast cancer between two and three times as high as that of matched, contemporary sanatorium patients treated by other means. There was a tendency for the malignant disease to develop on the side of collapse, and there was evidence of a characteristic latent interval between exposure and onset.

Aged↗
PubMed1983

Chest radiography and cardiac fluoroscopy in coronary artery disease.

Recent studies suggest a new and important role for the chest film and cardiac fluoroscopy in the assessment of coronary artery disease. The detection of coronary artery calcification and the radiographic appearance of myocardial infarction are just two of the topics thoroughly described in this article.

Calcinosis↗
PubMed1984

Dye-enhanced fluoroscopy-directed catheter embolectomy.

A method is presented that uses a double-lumen balloon catheter to perform embolectomy under contrast-enhanced fluoroscopy control. The technique has the advantage of localization of the thrombi before removal; it permits the individual arterial branches to be entered during embolectomy and allows confirmation of the patency of the arterial tree after completion of the embolectomy.

Catheterization↗
PubMed1982

Intensive care unit bed extension for fluoroscopy.

Effective use of the 'C-arm' X-ray fluoroscopy machine in the intensive care unit (ICU) is often prevented by the design of the ICU bed. An inexpensive, easily constructed device is described which facilitates use of the 'C-arm' machine, yet permits the patient's monitoring and life-support apparatus to remain attached and functioning.

Beds↗
PubMedDate not supplied

The use of intraoperative fluoroscopy and spinal cord monitoring for transoral microsurgical odontoid resection.

The transoral approach to the upper cervical spine has not gained wide acceptance. A reliable intraoperative method to determine the necessary extent of dissection and degree of decompression, as well as to evaluate spinal cord function, should improve the safety and applicability of the transoral approach. Four cases of anterior cervical cord compression were successfully treated by odontoid resection employing a microsurgical transoral approach. Intraoperative fluoroscopy monitored the depth of dissection and adequacy of decompression. Somatosensory cortical evoked potentials (SSEP) allowed assessment of spinal cord function that could be correlated with surgical decompression. In addition, follow-up examination revealed that SSEP was an intraoperative prognosticator of subsequent neurologic improvement.

Adolescent↗