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The New IRAM KID Arrays 2 (NIKA2) consortium has just finished installing and commissioning a millimetre camera on the IRAM 30 m telescope. It is a dual-band camera operating with three frequency multiplexed kilo-pixels arrays of Lumped Element Kinetic Inductance Detectors (LEKID) cooled at 150 mK, designed to observe the intensity and polarisation of the sky at 260 and 150 GHz (1.15 and 2 mm). NIKA2 is today an IRAM resident instrument for millimetre astronomy, such as Intra Cluster Medium from intermediate to distant clusters and so for the follow-up of Planck satellite detected clusters, high redshift sources and quasars, early stages of star formation and nearby galaxies emission. We present an overview of the instrument performance as it has been evaluated at the end of the commissioning phase.

Background Diagnosis of infiltrative small intestinal (SI) disease in cats is challenging, and debate continues regarding optimal biopsy techniques. Ultrasonography may facilitate selection of biopsy type and location. Hypothesis/Objectives Assess ability of ultrasonography to predict histologic lesions by SI segment and tissue layer. Animals One‐hundred sixty‐nine cats that had abdominal ultrasonography and full‐thickness SI biopsies performed. Methods Ultrasonographic images and full‐thickness biopsy samples were retrospectively reviewed, and each SI wall layer evaluated for lesions according to published standards. Results Ultrasonographic SI lesions were present in 132 cats (63 duodenum; 115 jejunum; 71 ileum). Samples were obtained at laparotomy (60) or necropsy (109). Ultrasonographic abnormalities had high positive predictive value (PPV) for histologic lesions (duodenum, 82.0%; 95% confidence interval [CI], 68.6‐91.4; jejunum, 91.0%; 95% CI, 81.5‐96.6; ileum, 88.1%; 95% CI, 74.4‐96.0), but poor negative predictive value (duodenum, 27.1%; 95% CI, 17.2‐39.1; jejunum, 27.3%; 95% CI, 10.7‐50.2; ileum, 40.4%; 95% CI, 26.4‐55.7). The ability of ultrasonography to predict histologic lesions in this population, which had high disease prevalence (SI histologic lesions in 78.1% of cats) was high for mucosal lesions (PPV, 72.7%‐100%) but low for submucosal or muscularis lesions (PPV, 18.9%‐57.1%). Conclusions and Clinical Importance In a population with high disease prevalence, most cats with SI mucosal ultrasonographic lesions will have mucosal histologic lesions. Small intestinal submucosal and muscularis ultrasonographic lesions are not predictive of histologic disease in those layers, suggesting that full‐thickness biopsy may not be essential in these cats. Ultrasonography may help guide decisions about biopsy type in individual cats.