Sherrard, D. J., 133 Sherwood number, 107 Sherwood, B. A., 364, 399 Shimizu, H., 542
Shot noise, 242, 312 Shrier, A., 276, 283
Sick sinus syndrome, 194, 200 Sicouri, S., 201
Sidtis, J. J., 513 Siegel, J. A., 505, 513 Siemens, 145
Sievert (unit), 468 Signal, 75, 306
and noise, 308 radiographic, 451
Signal averaging, 308 Signal-to-noise ratio, 452
Sigworth, F. J., 239, 241, 243, 253, 254 Silicon, 445
Silver halide, 441 Silver, H. K., 41, 47 Silver, S., 175
Silverstein, M. E., 119, 133 Sinc function, 528
Singh, M., 341, 455, 478, 527, 542 Singh, N., 435
Singh, S., 435
Single-channel recording, 238
Single-photon emission computed tomography, 501 Sink, 262
Sinoatrial node, see see SA node Sinogram, 333
Sinus exit block, 200 Skofronick, J. G., 348, 349 Slater, J. D., 467, 479 Slater, J. M., 479
Slice selection, 527, 528 Slichter, C. P., 518, 523, 542 Slide projector, 396
Small intestine, 213 Smith, M. A., 398 Smith, W., 323 Smye, S. W., 372, 399
Smythe, W. R., 166, 175 Snell’s law, 388
Snow blindness, 381
Snyder, W. S., 489, 494–496, 513 Sobol, W. T., 446, 479 S¨oderberg, P. G., 381, 397 Sodium
-potassium pump, 148 Nernst potential, 155
24Na, 487 Sodium gate, 157
Sodium spectral line, 372 So er, B. H., 387, 399 Solar constant, 377, 395
Index 611
Soleus, 6
Solid angle, 181, 366, 544 defined, 543 theorem, 198
Solute, 67, 69
Solute permeability, 120 pore model, 128
Solute transport, 119, 122 pore model, 127
Solution ideal, 114
Solvent, 67
Solvent drag, 85, 119
in an electric field, 235 Sorenson, J. A., 501, 502, 511, 513 Sorgen, P. L., 201
Sound level measurement weighting, 347
Source, 262
Space invariance, 327 Spano, M. L., 276, 283, 284
Sparks, R. B., 488, 489, 494, 513 Spatial frequency, 326, 329
and field of view, 329 and resolution, 329
Special relativity, 203, 220, 222, 405, 482 Specific absorbed fraction, 489
Specific absorption rate, 534, 539 Specific heat
water, 75
Specific heat capacity, 61, 382 Specific metabolic rate, 46 SPECT, 501
Spector, R., 47
Spectral e ciency function, 387 Spectroscopy
infrared, 368 Spectrum
beta decay, 487 Wiener, 452
Spherical aberration, 389 Spherical coordinates, 577 Spherocytosis, 117
Spheroid degeneration of the eye, 381 Sphincter, pre-capillary, 20
Spider’s thread, 25 Spin
electron, 215, 361
spin
nuclear, 517
Spin echo (SE), 526, 528 fast or turbo, 532
Spin quantum number, 402 Spin warp encoding, 528 Spiral CT, 455
Spiral wave, 186, 275, 283 Spontaneous births, 294