Molecular Imaging

Molecular imaging (also called nuclear medicine or nuclear imaging) can image the function of cells inside the body at the molecular level. This includes the imaging modalities of positron emission computed tomography (PET) and single photon emission computed tomography (SPECT) imaging. How does PET and SPECT imaging work? Small amounts of radioactive material (radiopharmaceuticals) injected into a patient. These can use sugars or chemical traits to bond to specific cells. The radioactive material is taken up by cells that consume the sugars. The radiation emitted from inside the body is detected by photon detectors outside the body. Computers take the data to assemble images of the radiation emissions. Nuclear images may appear fuzzy or ghostly rather than the sharper resolution from MRI and CT.  But, it provides metabolic information at a cellular level, showing if there are defects in the function of the heart, areas of very high metabolic activity associated with cancer cells, or areas of inflammation, data not available from other modalities. These noninvasive imaging exams are used to diagnose cancer, heart disease, Alzheimer’s and Parkinson’s disease, bone disorders and other disorders. 

IU & Regenstrief Conducting Nation’s First Randomized Controlled Dementia Screening Trial

Researchers from the Indiana University Center for Aging Research and the Regenstrief Institute are conducting the nation’s first randomized controlled dementia screening trial to weigh the benefits and risks of routine screening for dementia. The results of the five-year trial will help policy-makers, individuals and families weigh the pros and cons of routine screening of adults age 65 and older.

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Circulating breast cancer DNA a clear indication of malignancy

While radiographic evaluation of breast cancer may provide important information about tumor structures, it does not provide information about tumor burden. A novel method of cancer assay singling out circulating tumor DNA could provide additional information about tumor activity and lead to more accurate assessment and patient prognosis, according to a study published in the March edition of the New England Journal of Medicine.

Kit simplifies preparation of angiogenesis-scouting PET agent

Riding the wave toward expanded use of integrin-targeting angiogenic drugs, an agent requiring a complicated process of synthesis can now be generated in similar form with a simple kit. The agent, F-18 alfatide, is radiolabeled with integrin avb3-targeting peptides that bind to active tumor processes in squamous or adenomatous carcinoma--in this case of the lungs, according to research published this month in The Journal of Nuclear Medicine.

Dual-biomarker planar scintigraphy best for repeat hyperparathyroidsim surgery

Multiple surgeries to resect or remove parathyroid glands are necessary for up to 7 percent of patients with hyperparathyroidism, a syndrome of glandular hyperactivity resulting in an overproduction of parathyroid hormone and increased levels of calcium. Planar scintigraphy with I-123 and Tc-99m sestamibi may be the most accurate imaging method for reoperative localization of the parathyroid glands, according to a study published in the May issue of The Journal of Nuclear Medicine.

SPECT smokes out cigarette-related changes in the lung leading to COPD

Ventilation and perfusion (V/Q) SPECT could one day be used to track the early warning signs of cigarette smoke-induced chronic obstructive pulmonary disease (COPD) by documenting telltale airflow dysfunction.

FDG PET/CT upstages radiography in unmasking multiple myeloma

Although the outlook for patients with multiple myeloma, a cancer that attacks blood plasma and bone marrow, is typically dismal, F-18 FDG PET/CT has emerged as a strategy that could provide earlier diagnosis as well as more accurate treatment monitoring and patient prognosis, according to a review in the April issue of the American Journal of Roentgenology.

Research shows unique dementia profile for those with TBI history

Dementia in people with a history of traumatic brain injury (TBI) may be a clinical phenotype distinct from other known dementia subtypes, according to a study published in the April issue of NeuroRehabilitation.

Cardiac, stroke risk assessments trump dementia scoring as cognitive decline predictors

An evaluation of cardiovascular and stroke risk was found to be a more promising predictor of potential cognitive decline than an assessment used to predict development of dementia, according to a study in the April issue of Neurology.