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At least 19 recordsLinked to original sources
PubMed1992

The diagnosis of sinusitis in infants and children: x-ray, computed tomography, and magnetic resonance imaging. Diagnostic imaging of pediatric sinusitis.

Plain film radiographic examination, the historical standard, is rapidly being supplanted by computed tomography (CT) and magnetic resonance imaging (MRI) in the diagnosis of sinusitis. In particular, many endoscopic surgeons consider CT to be a mandatory part of the preoperative evaluation. MRI is useful for cases complicated by orbital or intracranial extension. However, because of considerations of cost, the need for sedation, and for CT radiation exposure, conventional x-ray films will continue to play an important role in the diagnosis and management of medically treated sinus disease. Incidental sinus abnormalities in children without apparent symptoms are usually the result of resolving, uncomplicated upper respiratory tract infection. Opacification, moderate-to-severe mucosal thickening, or air fluid levels in patients with persistent symptoms indicate sinusitis. Sinus imaging in children, whatever the modality, is demanding both in obtaining technically adequate studies and interpreting findings. Poor-quality examinations usually overestimate the presence and severity of disease. Ideally, children should be referred to centers with expertise in pediatric ear, nose, and throat imaging.

Child, Preschool↗
PubMed1998

Ratite diagnostic imaging.

Diagnostic imaging of ratite species is a challenge, even to the specialist. A portable radiography unit is frequently inadequate to penetrate the coelomic cavity of large birds, but should provide diagnostic quality radiographs of the extremities. Ultrasonography allows visualization of the coelomic structures, but will not penetrate gas or air. Use of both technologies often provides diagnostic information helpful to the clinician.

Animals↗
PubMed1989

Telemedical imaging--the diagnostic imaging department's perspective.

A survey of Alberta hospitals indicates a provincial perspective of the relationship between telemedical imaging and the diagnostic imaging department. Current image transmission technology literature demonstrates a degree of correlation with the results determined from the telemedical imaging survey. After presenting a brief definition of telemedical imaging, the areas assessed include: relative need, functional objectives, cost effectiveness, user-technology concerns and transmission system expectations.

Alberta↗
PubMed1998

Evaluation of diagnostic imaging tests: diagnostic probability estimation.

In the evaluation of a diagnostic imaging test for the diagnosis of a particular illness in a particular category of patients, the test should be construed as leading to a test result in the sense of a set of descriptive readings from the image(s), not interpretation of these; and in the evaluation of the test, therefore, the first challenge is the translation of each test result (set of readings) into the corresponding probability that the illness is present. This interpretive translation should not be subjective, nor should it be based on an objective algorithm founded on clinical judgments. Instead, a suitable diagnostic probability function (of the elements in the test result) should be derived empirically by logistic regression analysis of suitable data. We illustrate this alternative outlook by reanalysis of the data from the Prospective Investigation of Pulmonary Embolism Diagnosis.

Adult↗
PubMed2001

Imaging diagnostics strategy in maxillary sinus neoplasms.

Malignant neoplasms of maxillary sinuses are a serious diagnostic and therapeutic challenge, so the objective of a clinician is the planning of a cost-effective strategy promptly leading to proper diagnosis and the onset of treatment. Thus the aim of the paper was the elaboration of diagnostic strategy in maxillary neoplasms. There were analyzed 163 case records of 78 patients with maxillofacial neoplasms. The number and sequence of the conventional radiograms as well as diagnostic imaging methods were registered. There was proposed an algorithm of application of imaging techniques in diagnostics of neoplasms of maxillary antra. It was found that conventional X-rays are still valuable in screening for sinus pathology and as indication of the necessity of performing other imaging examinations. Computed tomography and magnetic resonance are complementary in visualization of pathologic masses and bone tissue destruction.

Diagnosis, Differential↗
PubMed1987

Marketing considerations for diagnostic imaging centers.

Diagnostic imaging centers seek every possible advantage to maintain a successful practice in the face of competition from hospitals and other freestanding operators. Several radiologists and business managers involved in existing or planned centers discuss their marketing strategies, modality choices, organizational structure, and other issues pertinent to the start-up and operation of a viable free-standing operation.

Ambulatory Care Facilities↗
PubMedDate not supplied

Optical disk archiving using a personal computer: a solution to image storage problems in diagnostic imaging departments.

The paper describes an approach to solving the problem of providing a large-capacity image archive for diagnostic imaging departments at reasonable cost. Optical disk stores, when fitted retrospectively to scanners, are very expensive and may not be compatible with existing computer hardware. We describe the use of an industry standard personal computer (PC) linked to a standard 5 1/4-in. optical disk drive as a 'stand-alone' image store. Image data are transferred from the scanner using 8-in. floppy disks, and these are read into the PC using an attached 8-in. floppy disk drive and then transferred to the optical disk. The patient details (patient name, ID, date, etc.) are entered into a database program held on the PC and these are used to generate a reference pointer to the optical disk file through which the data can be retrieved. Data retrieval involves entering the patient details into the data base and inserting a blank 8-in. floppy disk into the drive attached to the PC. A sector copy is then made from the optical disk to the 8-in. floppy disk, which can then be used at the viewing station at the scanner. The system is flexible since it can accept data from a variety of sources in any format; it is also low cost and operates independently of the scanner. The hardware is industry standard, ensuring low maintenance costs.

Diagnostic Imaging↗
PubMed2005

[Diagnostic imaging of spinal diseases].

With the advent of magnetic resonance imaging, diagnostic accuracy of spinal disorders has been much improved regarding their localization and histological prediction. The location of herniated disc materials is well appreciated on MR images without using contrast materials. MRI can predict the posterior longitudinal ligament is perforated or not. Kinematics of the spinal axis and CSF flow movement is evaluated on MRI with fast imaging. MR angiography with 3D reconstruction depicts the Adamkiewicz's artery and anterior spinal artery. Neuritis and neuropathy can be diagnosed by post-contrast T1 weighted image since inflammatory nerves are thick and enhance. Some intramedullary deseases tend to involve the peripheral area of the spinal cord; others are central. Edema extends longitudinally within the spinal cord by sparing the peripheral margin of the spinal cord and it is well appreciated with the T2- and proton- weighted images. The lateral and posterior funiculi are more frequently involved in multiple sclerosis.

Diffusion Magnetic Resonance Imaging↗
PubMedDate not supplied

[The preoperative staging of rectal neoplasms: the clinical exam and diagnostic imaging].

The management of rectal cancer remains an important clinical problem. Although there was been great progress in surgical management, the survival of patients with locally advanced disease has not improved significantly during the past decades. Preoperative staging and evaluation of the risk of recurrence may help in the choice of operation. It is difficult for clinicians to quantify reliably with digital examination the degree of fixation of the tumor, and they usually cannot distinguish nodal metastases except in advanced cases. The more frequent overstaging of small tumors within one quadrant of the rectum is a major drawback of digital examination. Computed tomography and magnetic resonance seems to underestimate the extension of rectal tumors, but both can be helpful in selecting patients with advanced tumors for whom preoperative adjuvant treatment is being considered. Endoluminal ultrasound is superior in staging tumors confined to the rectal wall, but is not the ideal tool for staging: the results are examiner dependent, the field of vision in depth is limited, and stricturing tumors cannot be passed by the ultrasound transducer. Imaging diagnostic attendibility confirms the preeminent role of intraoperative exploration in the assessment of neoplastic diffusion in order to plan a correct surgical treatment.

Endosonography↗
PubMed1998

[Diagnostic imaging of adhesions of the temporomandibular joint].

OBJECTIVE: To study the image diagnostic criteria of adhesions of the TMJ. METHODS: 26 cases of intra-articular adhesions were collected from 103 cases with internal derangement of TMJ. The clinical examination, arthrographic findings and arthroscopic detections were compared. RESULTS AND CONCLUSION: The arthrographic findings showed that the lack, interruption and irregular joint margins of contrast material appeared in the superior space, the posterior band of disc appeared in the same relative position in both the closed and open views and intra-articular adhesion often associated with anterior disc displacement.

Adolescent↗
PubMed2005

Further reflections on diagnostic imaging in Canada.

Diagnostic imaging in Canada requires careful rethinking, retooling and innovative management. Much of the attention directed to diagnostic imaging services has focused on cost containment and most of this on supply-side management. These "reflections" reinforce and supplement the perspectives offered by Drs. Laupacis and Evans and extend considerations around demand-side management, from the perspectives of physician and patient. Focusing on physicians makes sense, since, in the end, they are the ones who order diagnostic imaging tests. Multidimensional reinforcing modalities are required to sustain changes in physician test-ordering behaviour. This should be combined with peer review and audit, clinical guidelines and a consultant role for radiologists, as described by Laupacis and Evans. Educating patients about risk, cost and appropriateness of diagnostic imaging tests is of supplementary importance.

Canada↗
PubMed1992

Appearances of choroidal osteomas with diagnostic imaging.

The diagnostic imaging appearances of three choroidal osteomas (osseous choristomas) are presented. This rare, benign choroidal tumour is being recognized with increasing frequency, and is important to remember in the differential diagnosis of any unusual mass in the ocular fundus lest it be mistaken for a more sinister lesion. All three osteomas were demonstrated by ocular ultrasound (US), fluorescein angiography (FA) and computed tomography (CT) but none by plain radiography. None of the lesions was visible on magnetic resonance imaging (MRI); the reason for this is probably the bony nature of the tumours. The appearances of choroidal osteomas on US, FA, plain radiography and CT are discussed. To our knowledge this is the first report of a series of choroidal osteomas investigated by MR.

Adult↗
PubMed1998

Diagnostic imaging.

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Diagnostic Imaging↗
PubMed1991

Diagnostic imaging.

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Diagnostic Imaging↗