How to set angle for Sparse-view Fanbeam CT simulation

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Hello, Kyle,
I am simulating a sparse-view fan-beam CT image. Given an clear CT image, I first do forward to get the sinogram and then use FBP to get its reconstructed image. Here is the code:

```
import sys
import os
import time
import numpy as np
from leapctype import *
import matplotlib.pyplot as plt
leapct = tomographicModels()
leapct.about()

numCols = 821
numAngles = 150 # 984 views for 360 degree, 150 views for 55 degree
print(numAngles)
start_angle = 0
end_angle = start_angle + 360
angles = np.linspace(start_angle, end_angle, numAngles, dtype=np.float32)

pixelSizex = 1.09
pixelSizey = 0.8224 * 1097 / 821

numZ = 1
numY = 256
numX = 256

numRows = 1
numCols, pixelSize, pixelSize, 0.5*(numRows-1), 0.5*(numCols-1), leapct.setAngleArray(numAngles, 360.0), 1100, 1400)
leapct.set_fanbeam(numAngles, numRows, numCols, pixelSizex, pixelSizey, 0.5*(numRows-1), 0.5*(numCols-1), angles, 625.61, 1097)
leapct.set_default_volume()

leapct.set_volume(numX, numY, numZ, voxelWidth=None, voxelHeight=None, offsetX=None, offsetY=None, offsetZ=None)
leapct.print_parameters()

g = leapct.allocateProjections() # shape is numAngles, numRows, numCols
f = leapct.allocateVolume()

img = np.load('xcat_test.npy')
f = 255*img[None,:,:].astype(np.float32)

startTime = time.time()
leapct.project(g,f)
print('Forward Projection Elapsed Time: ' + str(time.time()-startTime))

plt
plt.imshow(np.squeeze(g), cmap='gray')
plt.savefig('sinogram')

f[:] = 0.0
startTime = time.time()
leapct.FBP(g,f)
print('Reconstruction Elapsed Time: ' + str(time.time()-startTime))

plt.imshow(np.squeeze(f[f.shape[0]//2,:,:]), cmap='gray')

f.shape
```

The total number of projections is 984 and I want to set the angle start 0 to 360 degree. But the fbp.png is much clearer than what I expected.
I feel confused about why I did not see a parameter that I should set the total number of projections
Looking forward to your reply.

Start by reviewing the Python setup around numAngles, the angles array, setAngleArray, and set_fanbeam in the issue's example. Check the project's documentation or examples for how the total number of views is specified and reproduce the 150-view versus 984-view reconstruction. Done means the angle range and projection count are clearly documented or the example uses the intended configuration.

Written by the indexing model from the issue text.