A Research Study On Chol Pet Automatic Contouring

In our study: statistically, the extent of agreement between dynamic contrast MRI and histopathological staging was almost perfect (κ =0.880) and highly significant (P = 0.001), which is higher compared to the study done by Gupta N. and his colleagues on 60 patients, that resulted in good agreement equals (κ =0.690) and

The study covers work done in the ADNI PET core since the addition of florbetapir. The goals of the study were

The PET scanning is particularly useful in detecting cancer because most cancer cells use more glucose than normal tissues. In lung cancer, pet scans are sometimes used to observe for cancer in particular areas such as the lymph nodes, in the chest or to demonstrate the spreading activity of cancer cells to other areas the body. This would help the doctor to take a further decision about the treatment of a

Positron-Emission Tomography (PET) scan is a medical test that allows doctors to check the human body for any diseases. Doctors use the PET scan for many things, the main uses are checking for cancer, heart-related (Cardiovascular) diseases and brain (neurological) diseases. It also allows doctors to check organs and tissues and to see how they are working. PET scanners are a way of tracking diseases, using radioactive tracking that is injected into a vein in your arm, that is then absorbed by your organs and tissues.

Diagnostic Imaging is extremely relevant in today’s medical treatments. Doctors have a variety of different imaging and scans techniques that help diagnose, evaluate, and treat patients. The PET scan stands for Positron Emission Tomography and is a nuclear imaging test that shows metabolic activities of the brain. Unlike a CT, MRI and X-ray that scan to image the anatomy of the brain the PET scan image is an image of how the brain is functioning. A PET scan Uses Positron radiation combined with gamma ray wavelengths. A PET scan is used for various parts of body tissue including the brain, heart, and other large organs. According to John Hopkins Medicine “PET is most often used by oncologists (doctors specializing in cancer treatment),

Inclusion criteria were skull base meningioma, either histologically or imaging confirmed, with an indication for RT. This included x patients progressive after prior neurosurgical resection and x patients for primary definitive RT. A total of 928 patients were included in the database. Ethics approval was obtained from all three institutions. Munich/TUM included 213 (23%) patients, Freiburg 207 patient (22%), and Heidelberg 507 patients (55%). The median age was 58 years (range 14-86 years).

A PET scan does not only look at the size and shape of the brain, is also looks at and assesses the function. Meaning it tells you how the brain is working. There is little doubt that as we age structural changes happen in our brain. A way to test for this is to use neuroimaging techniques while performing certain tasks (i.e. recall or reading of names, etc. to test memory).

In 2001, the first simultaneous PET and CT scan became available. Due to the better image resolution, and combined cellular and anatomical imaging the technique provides, by 2006, PET only scanners were unavailable the USA as they became

The technology that is being investigated is the PET scan. The PET scan functions as a result of the specific atomic properties of positrons which are subatomic particles that have the opposite charge of electrons but the same mass. The PET scanner detects these positrons which are emanated by the radioactive chemicals attached to a chemical the body naturally metabolizes (Positron Emission Tomography, 2014). The PET scan is used in the fields of oncology, neurology, and cardiology to determine the flow of blood, the functionality of the organs, the health of heart tissue, the movement of cancer, and so forth (Positron Emission Tomography, n.d.). This technology works by inserting the patient with a radioactive material through injection,

The authors begin defending their stance by providing several reasons for the recent surge of CT procedures: rapid technological advances, convenience to the patient and cost effectiveness (David & Hall, 2007). The calculated dose a patient receives from a CT procedure is only an estimated exposure dose. To date, a patient’s

Positron emission tomography (PET) is a type of nuclear medicine imaging which uses radiotracers or also called as radiopharmaceuticals − minute amount of radioactive substances-labelled bio-compounds. This test shows the function of tissues and organs such as sugar metabolism, oxygen use and blood flow instead of mere structural images of, for instance blood flow to and from organs illustrated by magnetic resonance imaging (MRI) and computed tomography (CT). This feature makes it a useful diagnostic tool to help physicians detect and evaluate severity of various diseases or medical conditions including cancers (staging). PET may identify the early onset of diseases before it undergoes anatomical changes which make it apparent on other imaging

The study of positron emission tomography (PET) and single photon emission computed tomography (SPECT) scanning effectiveness in supporting better public health outcomes has been proven with the accuracy these devices provide in diagnosing illnesses and potentially sever medial conditions. The costs of a PET scanning system can easily surpass $1M in system costs alone however (Wagner, 1988). SPECT systems are equally expensive which make both of these systems' availability limited to only the most prosperous and wealthy areas of the world (Lejeune, Zahouri, Woronoff-lemsi,, et.al., 2005). One study indicated that over 95% of scans from these systems are entirely paid for by insurance programs that have specific preconditions defined for patients as the average cost can easily exceed $20,000 per full scan (Lejeune, Zahouri, Woronoff-lemsi,, et.al., 2005). The intent of this analysis is to evaluate the effectiveness of PET and SPECT scans in supporting better health outcomes, in addition to analyzing the benefits of these technologies to who has access to their tests. There is also an analysis of the diseases these technologies are most adept at diagnosing.

Since the 1970s,[4] multiple gated acquisition scanning (MUGA) has been the preferred imaging modality for baseline and serial assessment of LVEF for cardiotoxicity. There is concern that contemporary gamma cameras may not allow optimal patient positioning for LVEF assessments.[3] Thus, it is possible that contemporary MUGA in cancer patients may not provide accurate estimates of LVEFs. Inaccurate LVEF assessment may carry significant implications for the care of cancer patients receiving potentially cardiotoxic treatment since LVEFs play an important role in decisions to start, continue, hold or stop such treatment.

In case of longer emission acquisition times per bed position increase the PET image quality will obtain, but this should be balanced with patient relief and ability to durability longer procedure. Patient motion through both the CT and PET image acquisitions will reduce image quality and image artifacts will happen, usually each bed position of the PET scan takes 3 to 5 minutes, for the thin and small patients that time is dropped to 2 minutes in some PET-CT centers, and that time can drop to 1 minute in case of extreme pain or claustrophobia patients.

The most important advantage of PET imaging is it's ability to exhibit a higher sensitivity (detecting and recording more number of emitted events) when compared to other methods such as SPECT, in which physical collimators are required to reject photons, which are not within a defined angular range. Hence the collimators have lower geometric efficiencies i.e. the percentage of detecting emitting photons (0.01%) [7].