The European Association of Nuclear Medicine
Bajc M, et al. Eur J Nucl Med Mol Imaging 2019; [Epub ahead of print]
Bajc M, et al. Eur J Nucl Med Mol Imaging 2009; 36: 1356-1370
Bajc M, et al. Eur J Nucl Med Mol Imaging 2009; 36: 1528-1538
The Canadian Association of Nuclear Medicine
TechnegasTM Functional Lung Imaging
Ventilation SPECT/CT using TechnegasTM to quantify pulmonary function
V/Q SPECT using TechnegasTM to detect pulmonary embolism
Beyond PE clinical uses - results from clinical studies
Airflow limitation assessment in chronic airway diseases
Images were kindly provided by the Hunter New England Imaging (HNEI) at John Hunter Hospital and clinical data by the Hunter Medical Research Institute (HMRI)
Monitoring treatment response in asthmatic patients
Images and clinical data were kindly provided by the Woolcock Institute of Medical Research
Lung function evaluation before lung volume reduction surgery
Images were kindly provided by Macquarie Medical Imaging (MMI) and clinical data by Macquarie Respiratory & Sleep department at Macquarie University
"However, the standard technique for V/Q SPECT in the US involves the use of Xenon radiotracer rather than Technegas rendering direct comparison of equivocal rates less useful."
"The optimal tracer for ventilation studies is Technegas, an ultra fine dispersion of 99mTc-labeled carbon. [...] Its main advantage is greater percentage deposition in the alveolar spaces and less undesirable adherence to the central airways, compared with droplet radioaerosols."
"The best option for ventilation evaluation is aerosolized ultraﬁne 99mTc-labeled impregnated carbon particles (Technegas, Cyclopharm, Australia)."
"Ventilation SPECT imaging with Technegas was used as an estimation of regional ventilation [in asthma patients]."
"The introduction of the tomographic technique and the implementation of Technegas as a novel ventilation agent facilitated imaging of pulmonary embolism in comparison with planar imaging and particularly in COPD patients together with the new interpretation criteria."
"Although not as available as chest X-ray, V/P SPECT is a feasible alternative, especially because the introduction of SPECT and new ventilation tracers (i.e. Technegas) has lowered the number of non-diagnostic studies to <3%, even in the presence of obstructive lung disease."
"The best widely available agent for ventilation is 99mTc-Technegas, an aerosol of carbon nanoparticles (5-200 nm) generated in a high temperature furnace (Technegas Generator, Cyclomedica). Because of the very small particle size, this agent is distributed in the lungs almost like a gas and deposited in alveoli by diffusion, where they remain stable, thus providing the best possible images for ventilation SPECT."
"V/Q scintigraphy is a valuable functional imaging biomarker in relation to several aspects of COPD. Disturbances in the distribution of ventilation and perfusion, which are pertinent to the pathophysiology of COPD, are directly visualized, particularly when using inert gases or Technegas as ventilation tracers while performing the scintigraphy as SPECT."
"3D ventilation/perfusion SPECT imaging procedures have been used to help diagnosis. COPD patients have also been evaluated using Technegas (99mTc-labelled carbon particles). Technegas has the potential to provide valuable information for the diagnosis of COPD as it has been demonstrated to correlate positively with spirometric lung function."