Diagnostic Imaging
All Diagnostic Imaging articles
160 articles · showing 121–150
Digital (Computerized) X-ray Imaging Techniques
Digital (or computerized) imaging techniques came to x-ray in the 1980s when analog to digital (A/D) converters and computers were also adapted to conventional fluoroscopic image intensifier/TV systems.
How X-rays Are Created
X-rays are created by bombarding a tungsten target with electrons inside a device known as the x-ray tube.
What to Expect During an X-ray Examination
While there are differences, most conventional x-ray procedures are basically similar: Patient preparation involves removing any articles of clothing or jewelry that might interfere with the creation of the x-ray image. Many x-ray examinations require the administration of a contrast agent.
Why is X-ray Imaging Done?
X-ray imaging is one of the fastest and easiest ways for a physician to view the internal organs and structures of the body. X-ray imaging has been available for 100 years and is an excellent tool for assessing skeletal trauma (e.g.
New and Emerging Magnetic Resonance Imaging (MR Scan, MRI Scan)
New, Patient Friendly MR System Designs MRI, like CT, requires the patient to lie still on a special table inside the scanning gantry for ten to thirty minutes.
New and Emerging Magnetic Resonance Imaging (MR Scan, MRI Scan)
The evolution of MR angiography (MRA), CT angiography (CTA), and ultrasound angiography techniques have been significant developments, and they are replacing x-ray angiography as the preferred diagnostic tool for the detection of plaques and blockages (stenoses) in the blood vessels.
New and Emerging Magnetic Resonance Imaging (MR Scan, MRI Scan)
The evolution of MR angiography (MRA), CT angiography (CTA), and ultrasound angiography techniques have been significant developments, and they are replacing x-ray angiography as the preferred diagnostic tool for the detection of plaques and blockages (stenoses) in the blood vessels.
Additional Resources on MR Imaging
MRIsafety.com provides up-to-date and crucial information to healthcare providers and patients seeking answers to questions on MRI safety-related topics. The latest information is also provided for screening patients with implants, materials, and medical devices.
Applications and Clinical Benefits of MR Imaging
A benefit of MR is that, unlike conventional x-ray or CT imaging, it does not use x-ray radiation.
Why is MR Performed?
Magnetic Resonance (MR) Imaging (also known as MRI) was initially researched in the early 1970's and the first MR prototypes were tested on clinical patients in 1980.
Frequently asked questions about magnetic resonance (MR) imaging
Will the MR imaging examination hurt? No, MR imaging itself should cause no pain. MR imaging requires that the patient remain still during the examination. For some patients, keeping still for some time may be slightly uncomfortable.
Patient Preparation for an MR Examination
Some questions you may be asked before having MR imaging may include: Are you pregnant or is there a possibility that you may be pregnant? Are you allergic to any medication? Have you had any head surgery? Have you had heart surgery? What surgery, if any, have you had? Have you ever had joint surger
What A Person Experiences, What to Expect During a Nuclear Medicine Study
Many nuclear medicine examinations are similar and follow these general clinical guidelines: Various nuclear medicine studies require special preparation before the patient arrives such as fasting or taking pharmaceutical tablets in advance of the exam examination.
What A Person Experiences, What to Expect During a Nuclear Medicine Study
Often, the patient is imaged shortly after the administration of the radionuclide, but occasionally the patient may be asked to return 30 minutes to four hours after administration of the radionuclide, to begin the imaging process.
What A Person Experiences, What to Expect During a Nuclear Medicine Study
Many nuclear medicine examinations are similar and follow these general clinical guidelines: Various nuclear medicine studies require special preparation before the patient arrives such as fasting or taking pharmaceutical tablets in advance of the exam examination.
Breast Biopsy: Indications and Methods
A breast biopsy involves removing a sample of breast tissue to determine whether it is cancerous or benign (non-cancerous).
Breast Cancer MRI - Magnetic Resonance Imaging
Benefits of an MRI Exam of the Breast MRI has several potential benefits in helping to investigate breast concerns. An MRI exam allows breast images to be taken in any plane and from any orientation.
Ultrasound Imaging of the Breasts
Limitations of Ultrasound Ultrasound may have a difficult time imaging a breast abnormality that can be felt due to: The deep location of the abnormality within the breast Operator and equipment factors The ultrasound image contrast between the abnormality and the surrounding breast tissue Ultrasoun
Breast Cancer MRI - Magnetic Resonance Imaging
Limitations to an MRI Exam of the Breast While MRI has significant promise as a supplemental tool to mammography in the diagnosis of breast cancer, there are limitations associated with MRI.
Breast Cancer MRI - Magnetic Resonance Imaging
Magnetic resonance breast imaging (MRI, MR) has been approved by the U.S. Food and Drug Administration (FDA) since 1991 for use as a supplemental tool, in addition to mammography, to help diagnose breast cancer. Breast MRI is an excellent problem-solving technology.
Ultrasound Imaging of the Breasts
Breast ultrasound, also known as sonography or ultrasonography, is frequently used to evaluate breast abnormalities that are found with screening or diagnostic mammography or during a physician performed clinical breast exam.
Spiral CT and Helical CT
In addition to creating fantastic images of internal anatomy, these new 3D reconstruction techniques enable a number non-invasive "virtual endoscopy" procedures to be performed. Endoscopy involves the use of an endoscope to see inside organs of the body such as the colon or bronchi.
Brief History of CT
Computed Tomography (CT) imaging is also known as "CAT scanning" (Computed Axial Tomography). Tomography is from the Greek word "tomos" meaning "slice" or "section" and "graphia" meaning "describing".
What to Expect During a CT Examination
Most CT examinations are similar and include the following steps: Patients are encouraged to bring something to read or do in case there are any delays prior to their CT exam. Patients should wear comfortable, loose fitting clothing for their CT exam.
What to Expect During a CT Examination
Patients should lie still and relax during a CT study. Patients may hear the CT scanner rotating during the study. Depending upon the type of study being performed and the model of CT scanner being used, the whirring noise may be very quite or more noticeable.
Why is CT Performed?
Computed Tomography (CT) imaging, also known as "CAT scanning" (Computed Axial Tomography), combines the use of a digital computer together with a rotating x-ray device to create detailed cross sectional images or "slices" of the different organs and body parts such as the lungs, liver, kidneys, pan
Why is CT Performed?
CT is one of the best tools for studying the lungs and abdomen. CT is an invaluable tool in the cancer diagnosis process and is often the preferred method for diagnosing lung, liver and pancreas cancer.
How Does CT Work?
Computed Tomography is based on the x-ray principal: as x-rays pass through the body, they are absorbed or attenuated (weakened) at differing levels creating a matrix or profile of x-ray beams of different strength. This x-ray profile is registered on film, thus creating an image.
Frequently Asked Questions about Computed Tomography (CT) Imaging
Will the CT imaging Examination Hurt? No, CT imaging itself should cause no pain. CT imaging requires that the patient remain still during the examination. For some patients, keeping still for some time may be uncomfortable. The CT examination itself causes no bodily sensation.
Why is CT Performed?
Computed Tomography (CT) imaging, also known as "CAT scanning" (Computed Axial Tomography), combines the use of a digital computer together with a rotating x-ray device to create detailed cross sectional images or "slices" of the different organs and body parts such as the lungs, liver, kidneys, pan