Disease relevance of Subtraction Technique

• It was therefore in cases where the gallium scintigram showed no increased activity that the subtraction technique was of greatest value, for it permitted the diagnosis of hepatoma in two cases [1].
• A subtraction technique using 99mTc-tin colloid and 67Ga-citrate was helpful to mask the liver uptake of gallium and clearly identify the extent of acute pancreatitis [2].
• MATERIALS AND METHODS: Thirteen consecutive renal transplant patients with suspected vascular causes of renal insufficiency and/or accelerated hypertension were evaluated with gadolinium-based contrast and CO2 angiography with use of digital subtraction techniques [3].

High impact information on Subtraction Technique

• We have used subtractive suppression hybridization (SSH), a PCR-based cDNA subtraction technique, to contrast differential gene expression profiles in immortalized, non-tumorigenic rat embryo fibroblasts and in HRAS- transformed cells [4].
• The image contrast was significantly greater for the AFP-containing tumors, and the subtraction technique enhanced the image contrast more than 2-fold [5].
• In conclusion, the PCR-selected subtraction technique identified PAI-1 as one of the genes characterizing an early response of HUVEC to the diabetic-like interstitial environment modeled by GC and responsible for the defective branching of endothelial cells [6].
• MR characterization of suspicious breast lesions with a gadolinium-enhanced TurboFLASH subtraction technique [7].
• The advantages of spectral subtraction techniques were demonstrated for separation of SCP ROA signals when multiple chiral entities are present [8].

Biological context of Subtraction Technique

• In a series of screenings of cDNAs constructed by a cDNA library subtraction technique, we identified Jagged1, one of the Notch ligands, as a gene up-regulated by macrophage colony-stimulating factor (M-CSF) in bone marrow macrophages [9].
• Nuclear medicine localization procedures include single-tracer double-phase and dual-tracer subtraction techniques using technetium-99m sodium pertechnetate (Na(99m)TcO(4)), radioactive thallium chloride ((201)TlCl), (99m)Tc-sestamibi ((99m)Tc-MIBI) and (99m)Tc-tetrofosmin as tracers [10].

Anatomical context of Subtraction Technique

• Similarly, increased Dacron compared with ePTFE graft radioactivity was noted using technetium subtraction techniques: 71% vs 30% with a heart reference and 26% vs 11% with an iliac artery reference, respectively [11].
• Image analysis included an indium ratio technique (comparing aortic graft radioactivity to that of an iliac artery) and a red blood cell technetium subtraction technique (excluding blood pool radioactivity from graft radioactivity, with the heart or iliac artery serving as reference regions) [11].

Associations of Subtraction Technique with chemical compounds

• A gallium-67/technetium-99m subtraction technique was used with a variable weighting factor [12].
• Amipaque dacryocystography. Biplane magnification and subtraction technique [13].
• In fact, technetium subtraction techniques suggested less Dacron conduit reactivity [11].
• This study investigated downscatter effects in cardiac single-photon emission tomographic studies with simultaneous thallium-201/technetium-99m acquisition, and evaluated a previously proposed subtraction technique for downscatter compensation [14].
• The results infer that the DTPA conjugate has the greatest utility as an imaging agent but that it would require a background subtraction technique [15].

Gene context of Subtraction Technique

• Radionuclide subtraction technique and gray-scale echography were used to localize parathyroid lesions in 6 patients with primary hyperparathyroidism [16].
• The magnetization subtraction technique (MS), which is equivalent to the inversion recovery technique in strong magnetic fields, has been implemented in dynamic nuclear polarization-enhanced magnetic resonance imaging (DNPI) [17].
• The purpose of this study was to develop a digital subtraction technique to assess peri-implant bone change [18].
• The presence of diffuse or multinodular goitre can lead to a false negative study of 10 to 20% of parathyroid investigations when the thallium-pertechnetate subtraction technique is used [19].
• Magnetization transfer contrast and subtraction techniques appear to be the simplest and least time-consuming applications to improve the conspicuity and detection of contrast-enhancing lesions in patients with MS [20].

Analytical, diagnostic and therapeutic context of Subtraction Technique

• Barium studies, endoscopy, technetium-99m-labelled (erythrocytes and pertechnetate) scans, selective abdominal angiography using a digital subtraction technique and rectal endoscopic ultrasonography were performed [21].
• Each of them was evaluated by plain radiographs, technetium 99m pyrophosphate scans, arthrography with plain film subtraction technique, and culture of joint fluid [22].
• The aim was to evaluate a subtraction technique for breath-hold gadolinium enhanced three-dimensional magnetic resonance portography (3D-MRP) [23].

References