Accurate attenuation correction of emission data is mandatory for quantitative analysis of
PET images. One of the main concerns in CT-based attenuation correction (CTAC) of PET …

Accurate attenuation correction of emission data is mandatory for quantitative analysis of
PET images. One of the main concerns in CT-based attenuation correction (CTAC) of PET …

A major challenge in thoracic PET imaging is respiratory motion, which degrades image
quality to the extent that it can affect subsequent diagnosis and patient management. This …

PET/CT imaging has introduced new challenges in accurate quantitation of lung nodules
due to respiratory motion and mismatches in CT-based attenuation correction (CTAC). We …

Positron emission tomography (PET) is widely used for diagnosis and follow up assessment
of radiotherapy. However, thoracic and abdominal PET suffers from false staging and …

Movement degrades image quality in PET/CT. A common strategy is to gate the PET data,
reconstruct the images, register each image to a reference gate, and average the registered …

671 Objectives: Respiratory motion (RM) reduces accuracy in PET imaging. Proposed
correction methodologies concentrate on gated 4D acquisitions. However, resulting gated …

Respiratory motion in PET/CT imaging degrades PET image quantitation due to misaligned
attenuation correction (AC) factors and motion blurring. This work explores the use of the …

Background and objectives Attenuation correction is important for PET image reconstruction.
In clinical PET/CT scans, the attenuation information is usually obtained by CT. However …

Previously we have proposed a motion correction method for avoiding both motion blur and
image noise in respiratory-gated lung SPECT images [Ue, et al., 2005][Ue, et al., 2006]. In a …