Abstract: A shortened carbon nanotube and methods for preparing the same and contrast agents are disclosed. One embodiment includes a shortened carbon nanotube. The shortened carbon nanotube has a length of about 100 nm or less with a cargo. The shortened carbon nanotube is suitable for use in x-ray and MRI imaging as a contrast agent.

Abstract: A system for cardiac imaging is disclosed. A single camera system may be used to perform both gated blood pool and first pass imaging. The first pass camera tags the ECG/gated portion of the patient's exam to the first pass bolus as it travels through the right ventricle (RV), lung field and left ventricle (LV). In a typical test, a standard first pass test procedure is used except the patient is also connected to an ECG output device. The patient's R-wave is tracked and tagged to the first pass test data. The results may be displayed, for example, in a cine fashion, a static systolic/diastolic frame, a phase/amplitude frame, or any other desired format.

Abstract: A cardiac imaging system comprising two or more camera heads is disclosed. Each camera is capable of generating first pass and/or gated blood pool images. One of the camera heads may be oriented at an anterior position with respect to the patient, and the other camera head may be oriented at a side position.