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Medical imaging technique
Contrast CT, or contrast-enhanced computed tomography (CECT), is X-ray computed tomography (CT) using radiocontrast. Radiocontrasts for X-ray CT are generally
Contrast_CT
Medical imaging procedure
A computed tomography scan (CT scan), formerly known in a more rudimentary state as computed axial tomography scan (CAT scan), is a medical imaging technique
CT_scan
Substance which enhances visibility in X-ray-based imaging
tomography (contrast CT), projectional radiography, and fluoroscopy. Radiocontrast agents are typically iodine, or more rarely barium sulfate. The contrast agents
Radiocontrast_agent
many potential uses for the different phases of contrast CT. The majority of abdominal and pelvic CT's can be performed using a single-phase, but the evaluation
Computed tomography of the abdomen and pelvis
Computed_tomography_of_the_abdomen_and_pelvis
Substance to enhance X-ray imaging
solubility. Contrast media are primarily used to visualize vessels and changes in tissues on radiography and CT (computerized tomography). Contrast media can
Iodinated_contrast
Scrolls from ancient Italy
to unroll the scrolls virtually, using X-ray phase-contrast tomography (XPCT, "phase-contrast CT"), possibly with a synchrotron light source. The proposed
Herculaneum_papyri
Medical condition
that of water). In such cases, a CT scan without intravenous contrast is enough for classification. Still, if a contrast CT is performed, a category I cyst
Renal_cyst
Imaging technique using radiation
dose and scan times have reduced. CT exams are generally short, most lasting only as long as a breath-hold, Contrast agents are also often used, depending
Radiography
Bleeding around an area of dead tissue
Initial imaging will include a non-contrast CT head possibly followed by the use of contrast media to perform CT angiography of the vessels in the brain
Hemorrhagic_infarct
Bleeding within the skull
include post-stroke epilepsy and vascular cognitive impairment. A non-contrast CT scan (computed tomography) of the brain is commonly used as the initial
Intracranial_hemorrhage
Respiratory system imaging
chest CT is a group of computed tomography scan protocols used in medical imaging to evaluate the lungs and search for lung disorders. Contrast agents
Computed tomography of the chest
Computed_tomography_of_the_chest
Medical imaging of blood flow between heart and lungs
patients at high risk of contrast-induced nephropathy, it is possible to reduce the required amount of contrast using dual energy CT. With such a protocol
CT_pulmonary_angiogram
Medical investigation technique
Coronary CT angiography (CCTA) is the use of CT angiography to assess the arteries of the heart. The patient receives an intravenous injection of contrast and
Computed tomography angiography
Computed_tomography_angiography
Quantitative scale of radiodensity
one CT acquisition to another due to CT acquisition and reconstruction parameters (kV, filters, reconstruction algorithms, etc.). The use of contrast agents
Hounsfield_scale
Malignant neoplastic disease of the esophagus
in the central portion of the esophagus Contrast CT scan showing an esophageal tumor (axial view) Contrast CT scan showing an esophageal tumor (coronal
Esophageal_cancer
Medical imaging technique
of MRI contrast agents, and better than radiocontrast agents used in contrast CT scans. The more limited safety data in children suggests that such use
Contrast-enhanced_ultrasound
Physiological phenomenon impacting the human liver
differences (THAD) are areas of enhancement during the arterial phase of contrast CT of the liver. THAD is thought to be a physiological phenomenon resulting
Transient hepatic attenuation differences
Transient_hepatic_attenuation_differences
Build-up of blood between the dura mater and skull
hematoma, causing midline shift and compression of the ventricle. Non-contrast CT scan of a traumatic acute hematoma in the right fronto-temporal area
Epidural_hematoma
Medical diagnostic method
CT scans without intravenous contrast (also called non-contrast CT, in short NCCT) combined with CT scans after intravenously administered contrast fluid
Thrombus_perviousness
Radiologic sign of brain ischemia
hyperdense MCA sign) is a dense artery sign observed on non-contrast computed tomography (CT) of the brain and is an important early marker of acute ischemic
Dense_MCA_sign
Condition of the wall of the intestine
should be performed 4–6 weeks after an acute episode. [citation needed] Contrast CT is the investigation of choice in acute episodes of diverticulitis and
Diverticulosis
Bleeding into the brain's subarachnoid space
three percent of people in whom a non-contrast CT was found normal. A lumbar puncture or CT scan with contrast is therefore regarded as mandatory in people
Subarachnoid_hemorrhage
Medical imaging technique
tomography enterography (CT enterography, CTE) is a medical imaging technique which uses computed tomography scanner and contrast media to examine the small
Computed tomography enterography
Computed_tomography_enterography
Pattern seen in radiologic examinations
high density compared to the psoas muscle in contrast-enhanced CT and greater than the aorta in non-contrast CT imaging. Lee, Chris; Lynch, Richard (1 July
High-attenuation crescent sign
High-attenuation_crescent_sign
Cross-sectional X-rays of the head
some people have allergic reactions to contrast agents that are used in some CT procedures. Computed tomography (CT) has become the diagnostic modality of
Computed tomography of the head
Computed_tomography_of_the_head
Pain in the head, neck, or face
of neuroimaging for these headaches is controversial. Non-contrast computerized tomography (CT) scan is usually the first step in head imaging as it is
Headache
Medical Imaging test done on CT scanner
urography (CT urography or CT urogram) is a computed tomography scan that examines the urinary tract after contrast dye is injected into a vein. In a CT urogram
Computed_tomography_urography
Perfusion scanning using CT
Perfusion CT (also CT Perfusion or CTP) is a form of perfusion scanning that uses computed tomography to assess the vascularity of tissues in the body
Perfusion_CT
Component of body composition
is method of choice for LBM estimation to calculate the dose given in contrast CT in obese individuals with BMI between 35 and 40. A nomogram based on
Lean_body_mass
Non-destructive method of accessing scrolls
phase-contrast CT, while for the En-Gedi scroll micro-CT was used. Different imaging techniques can be used, including computed tomography (X-CT), micro
Virtual_unfolding
Radiography of the urinary tract
the iodinated contrast medium used in contrast CT and contrast radiography can cause allergic reactions, including severe ones. The contrast dye may also
Pyelogram
Increased concentration of blood vessels
Preoperative contrasted CT scans of the patient, showing multiple bilateral kidney tumors, with diameters ranging between 1 and 5 cm. Radiologically,
Hypervascularity
Tumor of the membranes surrounding the brain and spinal cord (meninges)
observed for atypical meningioma. Meningiomas are visualized readily with contrast CT, MRI with gadolinium, and arteriography, all attributed to the fact that
Meningioma
Type of endocrine gland cancer
whether the tumor can be surgically removed (its "resectability"). On contrast CT scan, pancreatic cancer typically shows a gradually increasing radiocontrast
Pancreatic_cancer
Medical condition
of contrast-induced nephropathy has not been demonstrated in the literature. Analysis of observational studies has shown that radiocontrast use in CT scanning
Contrast-induced_nephropathy
Cortical depression in the posterolateral head of the humerus
with continuing shoulder instability after trauma, and using double contrast CT as a gold standard, a sensitivity of over 95% was demonstrated for ultrasound
Hill–Sachs_lesion
Protrusions of the arachnoid mater for returning cerebrospinal fluid to circulation
Frontal bone. Inner surface. CT angiography showing an arachnoid granulation in the right transverse sinus Non-contrast CT scan of the head showing an
Arachnoid_granulation
Chemical compound
computer tomography (CT) and CT pulmonary angiograms (CTPAs). The radiocontrast agent is given intravenously in computed tomography (CT) scans, angiography
Iopromide
Medical imaging technique
medical diagnosis, staging and follow-up of disease. Compared to CT, MRI provides better contrast in images of soft tissues, e.g. in the brain or abdomen. However
Magnetic_resonance_imaging
Vertebrate organ involved in metabolism
plane to facilitate the liver transplantation procedure. Phase contrast CT image. Contrast is perfusing the right liver but not the left due to a left portal
Liver
Dilation of the renal pelvis due to obstruction of urine flow
Peripelvic renal cysts may look like hydronephrosis on non-contrast CT (left image). However, CT urography (at right) reveals non-dilated calyces and pelvises
Hydronephrosis
Benign brain tumor originating in astrocyte cells
exam which includes a neurological exam and an ophthalmological exam – a CT scan and/or an MRI scan will be performed to confirm the presence of a tumor
Pilocytic_astrocytoma
Topics referred to by the same term
abbreviated THAD, areas of enhancement during the arterial phase of contrast CT of the liver Terminal High Altitude Area Defense, abbreviated THAAD,
Thad_(disambiguation)
Computed tomography technique
spectrum, making it a spectral or energy-resolved CT technique. In contrast, more conventional CT scanners use energy-integrating detectors (EIDs), where
Photon-counting computed tomography
Photon-counting_computed_tomography
Medical condition
benign nodules. Enhancement: If the exam is done as a combined non-contrast and contrast CT, a solitary nodule with an enhancement off less than 15 Hounsfield
Lung_nodule
Pharmaceutical compound
related to psychedelic phenethylamines like mescaline. In contrast to its non-cyclized analogue CT-5172 (2,6-dimethoxy-3,5-dichlorophenethylamine), the drug
CT-5126
Imaging systems using changes in phase
grating-based phase-contrast CT field was extended by tomographic images of the dark-field signal and time-resolved phase-contrast CT. Furthermore, the
Phase-contrast_X-ray_imaging
Pattern seen in radiologic examinations
on either side of the non-enhancing optic nerve. It is seen on contrast-enhanced CT and MRI, and is used to tell an optic nerve sheath meningioma apart
Tram_track_(medicine)
Neoplasm in the brain
veins or ingested by mouth before a CT scan to better outline any tumors that may be present. CT scans use contrast materials that are iodine-based and
Brain_tumor
Tumors of the nervous or endocrine system within the pancreas
and evaluation of metastases, CT is more readily available. Notably, while many malignant lesions are hypodense in contrast-enhanced studies, the liver
Pancreatic neuroendocrine tumor
Pancreatic_neuroendocrine_tumor
Telephone call monitoring software
manufacturer's telephone system. By contrast, the companies that have owned and marketed CT Connect over the years (see the CT Connect history below) have made
CT_Connect
Medical imaging technique
Grabherr S, Thali MJ, Gygax E (2008). "Postmortem whole-body CT angiography: evaluation of two contrast media solutions". AJR Am. J. Roentgenol. 190 (5): 1380–9
Angiography
Use of computed tomography angiography to assess the coronary arteries of the heart
Coronary CT angiography (CTA or CCTA) is the use of computed tomography (CT) angiography to assess the coronary arteries of the heart. The patient receives
Coronary_CT_angiography
Scan of the heart for the assessment of heart disease
patients. A typical coronary CT calcium scan is done without the use of radiocontrast agent but it can also be performed using contrast-enhanced images as well
Coronary_CT_calcium_scan
Barium sulfate mineral
ceramics, and medical applications (for example, a barium meal before a contrast CT scan). Baryte is supplied in a variety of forms, and the price depends
Baryte
Mapping of data into a single system
brain CT/MRI images or whole body PET/CT images for tumor localization, registration of contrast-enhanced CT images against non-contrast-enhanced CT images
Image_registration
Capital city of Connecticut, U.S.
serving Greater Hartford; CT Cottages & Gardens; Connecticut Business, a glossy monthly serving all of Connecticut; and Home Living CT, a home and garden magazine
Hartford,_Connecticut
Medical imaging technique
ensure even coating of the contrast around spinal cord and reduce the possibility of layering of the contrast media just before CT scan. General anesthesia
Myelography
Rare type of stroke
T2-weighted sequences and diffusion-weighted imaging (DWI). As the non-contrast CT and spine CT angiography are ineffective in imaging modalities, doctors use
Spinal_cord_stroke
Medical diagnostic method
using ultrasound, magnetic resonance imaging (MRI), computed tomography (CT), or nuclear medicine (NM) imaging with PET or SPECT. These cardiac techniques
Cardiac_imaging
Medical condition
seen. On a CT scan, Caroli disease can be observed by noting the many fluid-filled, tubular structures extending to the liver. A high-contrast CT must be
Caroli_disease
Particle data acquisition technique
diffraction contrast tomography (DCT) and high energy X-ray diffraction microscopy (HEDM) X-ray diffraction computed tomography, often abbreviated as XRD-CT, typically
X-ray diffraction computed tomography
X-ray_diffraction_computed_tomography
Chemical element with atomic number 64 (Gd)
R. (1998). "Renal excretion of gadolinium mimicking calculi on non-contrast CT". Pediatric Radiology. 28 (6): 417. doi:10.1007/s002470050374. PMID 9634454
Gadolinium
Academic journal
Contrast Media & Molecular Imaging is a monthly peer-reviewed scientific journal published by John Wiley & Sons since 2006 and by Hindawi Publishing Corporation
Contrast Media & Molecular Imaging
Contrast_Media_&_Molecular_Imaging
Cancer originating in precursors to muscle cells
the meninges. A paratesticular presentation will often require an abdominal CT to rule out local lymph node involvement, and so on. Outcomes are strongly
Rhabdomyosarcoma
Medical diagnostic method
detect metastases a sensitivity of 80–95% is obtained, similar to that of contrast CT and MRI . Intraoperative use of the procedure increases its performance
Ultrasonography of liver tumors
Ultrasonography_of_liver_tumors
Lebanese physician
(April 2018). "Qualitative and quantitative radiological analysis of non-contrast CT is a strong indicator in patients with acute pyelonephritis". The American
Ali_A_Haydar
Second Pharaoh of the Eighteenth dynasty of Egypt
objects and bones which makes mummy characterization less satisfactory. In contrast, CT is an advanced form of X-ray that obtains hundreds of thin sections (slices)
Amenhotep_I
LI Rads for the Classification of HCC
of Radiology in 2011 to standardize the reporting and data collection of CT and MR imaging patients at risk for hepatocellular carcinoma (HCC), or primary
LI-RADS
Serious trauma to the cranium
injury. A non-contrast CT of the head should be performed immediately in all those who have sustained a moderate or severe head injury. A CT is an imaging
Head_injury
Medical imaging technique
computed tomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, flat panel CT or Digital Volume Tomography (DVT)) is a medical imaging
Cone_beam_computed_tomography
Medical diagnostic method
results. Alternative applications of Xe-enhanced CT scans consist of using it as an inhaled contrast agent. This provides radiologists and image scientists
Xenon-enhanced_CT_scanning
Medical diagnostic method
(absorption} of contrast material into the articular cartilage (a sign of cartilage fibrillation - splaying and fraying of the cartilage). CT arthrography
Arthrogram
Medical intervention
mammograms and typically substantially less than a standard CT exam. Using other non-IV contrast abdominal or pelvic scans such as a Virtual Colonography
Quantitative computed tomography
Quantitative_computed_tomography
Rare recessive genetic disorder
antibodies reveals bright, thick bands at the dermoepidermal junction. Non-contrast CT scans can image calcifications, but this is not typically used as a means
Urbach–Wiethe_disease
Branch of bioinformatics
radiation, respectively). A variation of CT known as contrast CT also requires the subject to take in a contrast medium called a radiocontrast (typically
Biological_data_visualization
Examination of one or both kidneys using medical ultrasound
with contrast-enhanced ultrasound (CEUS), elastography and fusion imaging. However, renal US has certain limitations, and other modalities, such as CT and
Renal_ultrasonography
Medical imaging technique
a computed tomography scanner (CT) and are known as PET–CT scanners. PET scan images can be reconstructed using a CT scan performed using one scanner
Positron_emission_tomography
System for medical classification
SNOMED CT or SNOMED Clinical Terms is a systematically organized computer-processable collection of medical terms providing codes, terms, synonyms and
SNOMED_CT
Medical condition
not conclusive, further workup includes: Blood tests Medical imaging: Contrast CT is generally the initial study of choice for adults. Medical ultrasound
Neck_mass
Aggressive type of brain cancer
arise from astrocytes. The diagnosis typically is made by a combination of a CT scan, MRI scan, and tissue biopsy. There is no known method of preventing
Glioblastoma
Medical diagnostic method
prerequisite for CT gastrography data evaluation; collapsed gastric wall may mimic disease or obscure underlying pathology. Negative oral contrast medium with
CT_Gastrography
History of radiation-based medical imaging
The history of X-ray computed tomography (CT) traces back to Wilhelm Conrad Röntgen's discovery of X-ray radiation in 1895 and its rapid adoption in medical
History of computed tomography
History_of_computed_tomography
Surgical procedure in which a part of an intestine is removed
Initial evaluation in trauma includes a FAST ultrasound exam followed by contrast CT abdomen in stable patients. The most common bowel injury in trauma is
Bowel_resection
Chemical compound
arteriography (imaging of arteries), venography (imaging of the veins) and CT scan enhancement, urography (imaging of the urinary system), arthrography
Iopentol
as x-ray CT in which the Hounsfield units value for water is set to zero, there is no standard reference signal for MRI. Thus the contrast-to-noise ratio
Contrast_resolution
Common type of liver cancer
evaluation requires imaging of the liver by CT or MRI scans. Optimally, these scans are performed with intravenous contrast in multiple phases of hepatic perfusion
Hepatocellular_carcinoma
Benign tumor of the vestibulocochlear cranial nerve
advantage of a CT scan is to assess the extent of bony involvement by VS. VS enhances when iodinated contrast is given. A contrasted CT scan of the temporal
Vestibular_schwannoma
Radiologic sign on radiographs and computed tomography scans
computed tomography (CT) imaging of the lungs. It is typically defined as an area of hazy opacification (x-ray) or increased attenuation (CT) due to air displacement
Ground-glass_opacity
Diagnostic imaging test
which are the major targets of contrast agents. The technique of HRCT was originally developed[when?] with relatively slow CT scanners, which did not make
High-resolution computed tomography
High-resolution_computed_tomography
Chemical compound
acid (trade name Hexabrix) is pharmaceutical drug used as an iodinated contrast medium for X-ray imaging. It has low osmolality (relatively few molecules
Ioxaglic_acid
Pattern seen in radiologic examinations
ring-enhancing lesions may be done using CT (computed tomograghy) or MRI (magnetic resonance imaging). However, brain MRI with contrast enhancement is considered the
Ring-enhancing_lesion
Infection that results in the death of the body's soft tissue
thickening or enhancement with contrast, necrotizing fasciitis should be strongly suspected. However, MRI is much slower than CT and not as widely available
Necrotizing_fasciitis
Vacuum tube that converts electrical input power into X-rays
In contrast to other sources of ionizing radiation, X-rays are only produced as long as the X-ray tube is energized. X-ray tubes are also used in CT scanners
X-ray_tube
Medical condition
with variable heterogeneity and calcification on non-contrast CT scan, and enhances with contrast. This radiographical finding is consistent with a primitive
Medulloepithelioma
Type of CT scanning
fluid dynamics is perfusion CT in which the propagation of contrast agent is modelled and simultaneously estimated with the CT images. Cox, James D.; Chang
4DCT
Collection of cerebrospinal fluid (CSF), without blood, located under the dural membrane
with CSF. If iodinated contrast is administered during CT scan, the hygroma will produce high density because of the contrast at 120 kVp. However, at
Subdural_hygroma
X-ray imaging of the urinary bladder
during the procedure itself. CT cystography is performed by filling up the urinary bladder using diluted iodinated contrast to visualise any bladder injury
Cystography
Kurtág. Music arranger: György Kurtág Béla Bartók "Sebes (Fast Dance)" (Contrasts, 3rd movement) Performer: Benny Goodman. Performer: Joseph Szigeti. Performer:
List of Private Passions episodes (2020–present)
List_of_Private_Passions_episodes_(2020–present)
Form of electromagnetic radiation
without contrast agent, would be equivalent to 40 years of background radiation to the head. Accurate estimation of effective doses due to CT is difficult
X-ray
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