1 Global Ap Introduction has been dem imaging of th differences b [4,5]. But this time-interleav temporal pha band excitatio phase. Theory: If N that the slices propose to ac using parallel employed. Fo acceleration f so that the ind 1 and 2. f 1 an of the slices. For the tGR 2, 4, 6, … as Where S 1 and direction. The tGRAPPA. Method: Pha channel head excited. In ea implemented along the wav Results and results for the seen, the slice to shorten ech In case of a throughout th out sampling tGRAPPA me References: 5(12), 2010 ( (7) Beatty P.J Figure 1 Time-interlea Suchandrima pplied Science Lab n: Simultaneous ex monstrated in impr he whole head [2,3 etween these slice s involves addition ved approaches su se, and calibration on scheme that tra N slices are excited s can be separated cquire data with on l imaging principl or the sake of sim factor R=2. The ex dividual coil imag d f 2 can be written In a matrix form RAPPA analogy w block 2, and their d the ρ 1 represent t e similarity betwe antom and in vivo d array (Nova Me ach scan, 12 time . Once the data co veform direction. Discussion: Figur e same 3 slices exc es have been unal ho-train length. By time series acquis he scan for a more pattern is employ ethods. (1) Breuer F et a (4) M. Blaimer et J, ISMRM 2007 #1 aved parallel i a Banerjee 1 , Yuval b, GE Healthcare, Science Lab xcitation of multip roving the tempor 3]. Slices that are e e locations and cal nal prescan, and m ch as tGRAPPA h n data is collected anslates to a simila simultaneously w d by some linear co nly one of these N les. Calibration da mplicity, let us xcitation scheme is es obtained from t n as S 1 · ρ 1 and S 2 ⋅ρ 2 with acceleration R corresponding im the coil sensitivity en [1a] and [1b] s o experiments wer edical, USA) on a e frames were acq orresponding to al re 2a) shows thre cited by the 3 band iased completely. y using this time-i sition such as func robust reconstruct ed for all tempora al, MRM 53: 684- al, JMRI 24, 444 1749 imaging appro Zur 2 , Atsushi Tak Menlo Park, Calif b, GE Healthcare, ple slices helps red ral resolution of ec excited simultaneo libration data can matching of the slic have been proposed from neighboring ar reconstruction p with N different exc ombination of the excitation wavefo ata is collected fro discuss the case o s shown in Figure these 2 waveforms 2 where S 1 , S 2 are t ൬ ଵ ଶ ଵ െ ଶ ൰ R = 2, if we denote ages as B1 and B2 ൬ ଵ ଶ ଵ െ ଶ ൰ and the “ideal” im hows that k space re conducted usin a GE 3.0 T MR75 quired. Slice t-AR ll the waveforms e slices that were d RF pulse, for the This technique ca interleaved approa ctional MRI, there tion and to improv l phases, the propo -691, 2005 (2) M (2006) (5) Setsom Figure oach to separa kahashi 1 , Ajit Shan fornia, United Sta San Francisco, C duce the time need cho-planar functio ously by a multi-b be acquired from ce prescription to s d for multi-phase s g k-space lines of n problem, even thou citations, the phase N signals, for ex. orms, and to synthe om the previous N of two slice excit 1. The phase of th s are I 1 = f 1 + f 2 an the coil sensitivitie ቀ ߩଵ ߩଶ ቁൌ ൬ ܫଵ ܫଶ ൰ e the set of odd k 2 respectively, an e ቀ ߩଵ ߩଶ ቁൌ ൬ ܤଵ ܤଶ ൰ mage respectively, e data of I 1 and I 2 ng an echo-planar 50 scanner (Wauk C, a time-interlea were synthesized, excited separately e 9 th time frame. Ca an be combined wi ach, slices are co-l e is also the flexib ve the calibration d osed method shou Moeller S et al, MR mpop K et al, MRM b) a) e 2 ation of simult nkaranarayanan 1 , a tes, 2 GE Healthca California, United S ded to acquire a fix onal MRI and for band excitation can a separate acquis slice locations exc scans where differ neighboring phase ugh the same sam e of each slice can . Fourier transform esize the rest N-1 N phases in each o tation only and co he second slice is i nd I 2 = f 1 – f 2 respe es at slice location ሾ1ሿ k-space lines 1, 3, equation similar to ሾ1ሿ S 2 and ρ 2 are S 1 a can also be arrang sequence incorpo kesha, WI). Three aved parallel imag , slices were sepa y by a single-ban alibration data wa ith in-plane accele localized between ibility of re-estima data by averaging uld be more robust RM 63: 1144-115 M 0?1-15,2011 (6 taneously exci and Douglas A.C. are, Tirat Carmel, I States xed number of slic reducing scan tim n be unaliased by sition where each cited by the multib rent sampling patte es [6]. In this work mpling pattern is em n be incremented a m (FT) or inverse waveform dataset of which a differen ompare it to conv inverted by the sec ectively, where f 1 a ns 1 and 2, and ρ 1 , 5, … as block 1 o [1a] can be writte and ρ 1 shifted by F ged in a block for orated with multib e slices 30 mm ap ging reconstruction arated in image sp nd RF pulse. Figur as collated from the eration to further r calibration and th ating the reconstru previous time fram to EPI phase erro 3, 2009 (3) Feinb 6) F. Breuer et al, M ited slices Kelley 3 Israel, 3 Global Ap ces [1]. Recently it me for diffusion sp exploiting coil sen slice is excited sep band RF pulse. Pre erns are employed k we will present mployed in each te across the excitatio Hadamard transfo ts from the first wa nt excitation wave ventional tGRAPP cond waveform (F and f 2 are images o , ρ 2 are the “ideal” and the set of ev en OV/2 in the phase rm and reconstruct band RF pulse, wi part were simulta n based on ARC pace by Fourier tra re 2b) shows slice e first 3 phases. A reduce acquisition he accelerated acqu uction kernel peri mes. Since the sam rs compared to tra berg D.A. et al, Pl MRM 53, 981-985 pplied ts utility pectrum nsitivity parately eviously d in each a multi- emporal ons such orm. We aveform eform is PA with Figure 1) of slices ” images ven lines e encode ted as in ith a 32 aneously [7] was ansform e t-ARC s can be n time or uisition. odically me read- aditional los One, 5 (2005) 2227 Proc. Intl. Soc. Mag. Reson. Med. 20 (2012)