نتایج جستجو برای: chest radiographs image enhancement

تعداد نتایج: 574089  

Aims Chest radiography is the first choice for the investigation of cardiovascular and respiratory disease. Radiographer technologists are responsible for managing the radiation exposure to patients and providing adequate image quality according to the ALARA concept. The knowledge and experience of radiographers in performing chest radiography helps to improve the diagnosis of diseases. The aim...

2012
Tahmineh Razi Arezu Mohammadi Morteza Ghojazadeh

BACKGROUND AND AIMS In periapical radiographic technique, the changes will be visible only after considerable deposi-tion or resorption while digital subtraction technique visualizes slight density changes. This study was aimed to compare visualization of density changes in conventional periapical radiographs and digital subtraction technique with or without image enhancement. MATERIALS AND M...

فلاح محمدی , غلامرضا, یوسفی, سهراب,

Abstract Background and purpose: The Commission of European Communities (CEC) has developed a guideline in which many common radiographic techniques are determined. Following these guidelines will reduce patient dose and good quality image is obtained. Noncompliance of radiographic centers with standard guidelines not only leads to reduction in radiographic image quality but also wastes reso...

Journal: :Radiologic technology 2014
Mark F McEntee Nariman Houssein Dhafir Al-azawi

PURPOSE The degree of lung inflation seen on a chest radiograph is dependent on the point during the patient's respiratory cycle at which the radiographer exposes the image receptor. Exposing the image receptor at the exact peak of inflation can be difficult because of the limited time available in which to capture the inspiratory pause. An incentive spirometer can indicate the moment of peak i...

Journal: :journal of medical signals and sensors 0
elaheh soleymanpour hamid reza pourreza mehri sadoghi yazdi

computer-aided diagnosis (cad) systems can assist radiologists in several diagnostic tasks.  lung segmentation is one of the mandatory steps for initial detection of lung cancer in posterior-anterior chest radiographs. on the other hand, many cad schemes in projection chest radiography may benefit from the suppression of the bony structures that overlay the lung fields, e.g. ribs. the original ...

Journal: :Lecture Notes in Computer Science 2021

Chest radiographs are one of the most common diagnostic modalities in clinical routine. It can be done cheaply, requires minimal equipment, and image diagnosed by every radiologists. However, number chest obtained on a daily basis easily overwhelm available capacities. We propose RATCHET: RAdiological Text Captioning for Human Examined Thoraces. RATCHET is CNN-RNN-based medical transformer that...

2016
Isabel Bush

Detection of malignant lung nodules in chest radiographs is currently performed by pulmonary radiologists, potentially with the aid of CAD systems. Recent advancements in convolutional neural network (CNN) models have improved image classification and detection for many tasks, but there has been little exploration of their use for nodule detection in chest radiographs. In this paper we explore ...

Introduction: The introduction of digital radiography has led to a significant problem in terms of dose creep. To address this problem, manufacturers have established a set of exposure indicators (EI) as a feedback mechanism to safeguard against overexposure. The EI is the measure of incident exposure to the detector that is directly proportional to the signal-to-noise...

2009
Spyros Tsevas Dimitrios K. Iakovidis George Papamichalis

Chest radiography is a reference standard and the initial diagnostic test performed in patients who present with signs and symptoms suggesting a pulmonary infection. The most common radiographic manifestation of bacterial pulmonary infections is foci of consolidation. These are visible as bright shadows interfering with the interior lung intensities. The discovery and the assessment of bacteria...

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