Single-shot ultrafast burst imaging using an integral field spectroscope with a microlens array.

To fully utilize the functions of a center-wavelength-sweeping pulse train generated by a free-space angular-chirp-enhanced delay optical layout for a probe laser pulse in sequentially timed all-optical mapping photography (STAMP), we introduced an integral field spectroscopy (IFS) method using a microlens array (MLA) to produce hyperspectral images, referring to the technique as lens array (LA)-STAMP. Compared with the previous STAMP utilizing spectral filtering where a bandpass filter generated hyperspectral images, LA-STAMP achieved much higher optical throughput. In a prototype setup, we used a 60×60 MLA and demonstrated single-shot burst imaging of a femtosecond laser-induced ablation process on a glass surface with 300 ps frame intervals in a 1.

Extension of time window into nanoseconds in single-shot ultrafast burst imaging by spectrally sweeping pulses.

We achieved single-shot 2D-burst imaging with a ∼22 temporal resolution in a nanosecond time window using sequentially timed all-optical mapping photography with a spectral filtering (SF-STAMP) scheme, where a single snapshot of spectral images measured with a linear frequency chirped laser pulse forms time-resolved snapshots. We combined a pulse-stretching scheme of a free-space angular-chirp-enhanced delay (FACED) composed of a pair of tilted mirrors and a 4-system. With a 4-FACED system, we generated collinearly propagating burst laser pulses with a different center wavelength and a tunable time interval and demonstrated single-shot burst imaging with a 303 ps interval in a 1.

Time-course analysis of brain perfusion single photon emission computed tomography using a three-dimensional stereotactic region-of-interest template in patients with moyamoya disease.

Objective: To verify the usefulness of the time-course analysis of regional cerebral blood flow (CBF) and cerebrovascular reserve (CVR) estimated quantitatively using the three-dimensional stereotactic region-of-interest template (3DSRT) to assess clinical status in patients with moyamoya disease.

Methods: The study comprised 12 patients (5 men and 7 women, age 35.1 years ± 14.